Best Spark Plugs

Contents

If you are looking for the best spark plug on the market, then you have come to the right place. This article will give a review and comparison of three best-selling brands in order to help you make an informed decision about which one is best for your vehicle.

The most popular brand we will be talking about is NGK. They offer some of the best quality products and are known for their consistency in performance. In addition, the NGK’s plugs provide a variety of benefits, including enhanced fuel economy, improved throttle response, reduced emissions, and increased engine power without sacrificing reliability or durability. Another great thing about these spark plugs is that they can last up to 50% longer than standard ones!

But, in general, NGK spark plugs are not the holy solution for each car. That is why we show the best and the most popular options in every case. To find them, just click on your model on this page.

What is a Spark Plug?

A spark plug is a small, threaded electrical component that features an electrode at one end and conductive metal components separated by an insulator at the other. A set of threads allow it to be screwed tightly into openings in the engine’s cylinder head, with one per cylinder.

All engines need a spark plug. It works by supplying an electrical current to the two electrodes in your engine’s combustion chamber. When this happens, an electrical arc forms and ignites the fuel-air mixture within the cylinder. After all of this goes off, there will be another explosion known as the power stroke that pushes the pistons downward, which distributes forces throughout your engine.

How does a Spark Plug Work?

The spark plugs ignition coil, which is attached to the terminal side of the spark plug, enters the combustion chamber. It ensures that pressure generated from an engine’s combustion process cannot escape. The gasket helps form a tight seal, and this makes sure no pressure can escape.

The ignition system sends a controlled spark through the plug, which jumps across the electrodes resulting in a visible spark.

Types of Spark Plugs

 

Copper

Copper core spark plugs are basic and affordable but have been replaced by other plug types due to performance.

NGK 2262 ZFR5F-11 V-Power Spark Plug

NGK is always looking for ways to improve your car’s engine. Their spark plugs are a bestseller – and for good reason! Trivalent metal plating provides superior corrosion resistance, an insulator that can withstand higher temperatures, and copper cores that help your engine reach peak performance. These features make NGK spark plugs the perfect addition to any driver’s engine.

Gap 0.043″ (1.1mm)
Heat Range 5
Longevity 30,000 miles

 

Autolite 5663 Nickel Spark Plug

Fram Autolite 5663 Copper Resistor Spark Plug, Pack of 1 (5503)
6 Reviews
Fram Autolite 5663 Copper Resistor Spark Plug, Pack of 1 (5503)
  • Copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof
  • Cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength
  • Multi-rib insulator reduces danger of "flash-over"
  • Resistor reduces radio frequency interference (RFI) and electrode erosion
  • Full copper core electrode provides better performance in all conditions

Keep your engine running smoothly with the Autolite 5663 NIckel Spark Plug. With its traditional nickel electrodes and Copper core, you’ll never have to worry about fouling plugs again. Plus, thanks to the power tip, it reaches deep in the combustion chamber for a thorough self-cleaning job.

Gap 0.035″ (0.9mm)
Item Weight 1.76 ounces
Resistor Value 5k Ohm
Longevity 30,000 miles

 

NGK 7133 BPR6ES-11 Nickel Spark Plug

NGK (7133) BPR6ES-11 Standard Spark Plug, Pack of 1, One Size
199 Reviews
NGK (7133) BPR6ES-11 Standard Spark Plug, Pack of 1, One Size
  • Solid copper core for greater spark
  • Longer insulator nose prevents fouling
  • Corrugated ribs on insulator prevents flashover
  • Zinc dipped shell prevents corrosion
  • Triple gasket seal eliminates combustion gas leakage

This spark plug has features that will prevent fouling and corrosion because we want your balance to stay factory fresh! It’s also incredibly reliable.

Gap 0.043″ (1.1mm)
Heat Range 6
Longevity 30,000 miles

 

NGK 6757 BPR6EKN Multi-Ground Spark Plug

NGK (6757) BPR6EKN Standard Spark Plug, Pack of 1
1 Reviews
NGK (6757) BPR6EKN Standard Spark Plug, Pack of 1
  • You can depend on NGK for quality and reliability
  • Constructed from durable material
  • Corrosion and abrasion resistant
  • Features corrugated ribs, ceramic insulator, copper core and triple interior seal
  • Reduces ignition system voltage requirements

You can depend on NGK for quality and reliability. Constructed from durable material, it’s corrosion and abrasion-resistant. It features corrugated ribs, ceramic insulator, copper core and triple interior seal- giving you a longer-lasting plug that reduces ignition system voltage requirements: your car will be running better than new!

Gap 0.031″ (0.8mm)
Heat Range 6
Longevity 50,000 miles

 

NGK 6364 BKR6ES Nickel Spark Plug

Have you been feeling sluggish lately? New spark plugs can give your engine a brand new life! These NGK 6364 BKR6ES Nickel Spark Plugs have long-lasting durability so that they won’t wear down faster than you want them to. Sprung from easily corroded nickel, these are perfect for giving your car a fresh new start and the clean air it needs!

Gap 0.035″ (0.9mm)
Heat Range 6
Longevity 30,000 miles

 

NGK 6953 BKR5E-11 V-Power Spark Plug

NGK Spark Plug, NGK BKR5E-11, ea, 1, One Size
1,057 Reviews
NGK Spark Plug, NGK BKR5E-11, ea, 1, One Size
  • Package Dimensions: 2.2 cms (L) x 2.8 cms (W) x 8.6 cms (H)
  • Product Type: Spark Plug
  • Package Quantity: 1
  • Country Of Origin: Japan

Your spark plugs may not seem important, but they’re the foundation of your engine- and any weak link will slow you down. Let NGK do all the heavy lifting for you with a new set of V-Power Spark Plugs! Engineered to outperform your typical spark plug by building up sparks faster and providing better ignitability, one of these bad boys will keep your engine running like a well-oiled machine.

The V-Dual Center electrode design directs sparks to where they’re most needed so that combustion is complete and engines start on the first try every time. They use corrosion-resistant trivalent metal plating, preventing them from degrading over time thanks to wet valves or pipes.

Gap 0.043″ (1.1mm)
Heat Range 5
Longevity 30,000 miles

 

NGK 2382 BKR5ES-11 Nickel Spark Plug

NGK 2382 BKR5ES-11 Standard Spark Plug, Pack of 1
163 Reviews
NGK 2382 BKR5ES-11 Standard Spark Plug, Pack of 1
  • Trivalent Metal Plating Provides Superior Anti-Corrosion and Anti-Seizing Properties
  • Corrugated Ribs Prevent Flash over
  • Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat Transfer
  • Copper Core Aids in Heat Removal
  • Triple Seals Prevent Leakage

NGK plugs are made from superior quality materials to help them last longer and perform better in the long run. So forget about cheap, knock-off brands- NGK’s got your back! Working with you all day can lead to pesky problems like leaks or car engine breakdowns, but not with these spark plugs on hand! With a copper core that goes right up through the center of the plug and 11 different features built specifically for your vehicle’s needs, ensure your ride stays running.

Gap 0.043″ (1.1mm)
Heat Range 5
Longevity 30,000 miles

 

NGK 2756 BKR6E-11 V-Power Spark Plug

NGK 2756 BKR6E-11 NGK-Power Spark Plug
135 Reviews
NGK 2756 BKR6E-11 NGK-Power Spark Plug
  • OEM/OES Manufacturer
  • High Quality
  • World Wide Leader

The NGK 2756 BKR6E-11 V-Power Plug is as coveted by professional racing teams as it is for the everyday driver. With a design that makes sure, your spark finds its way to the edge of the electrode, you’ll be burning rubber in no time with these plugs.

The NGK V Power Plugs are made from pure alumina silicate ceramic insulators which provide superior strength and heat transfer when compared to other plugs on the market today. One little feature that helps with ignitability is the v cut in each plug’s center electrode, this shortcut directs your spark directly into an open area for faster ignition so you can take off without delay.

Gap 0.043″ (1.1mm)
Item Weight ‎1.76 ounces
Engines 2.2l EJ22E, 2.5l EJ25,
Heat Range 6
Longevity 30k miles

 

Platinum

The platinum spark plug offers several benefits for drivers. These plugs last considerably longer than copper plugs and cost much less than iridium plugs.

NGK 5809 TR6AP-13 Laser Platinum Spark Plug

The NGK 5809 TR6AP-13 Laser Platinum Spark Plug will make sure your car isn’t left running on fumes. These plugs are made with pure alumina silicate ceramic, corrugated ribs for heat transfer, and copper cores to do the job right without any fuss. But don’t let these fancy plugs fool you; they’re waterproof thanks to triple seals to ensure complete functionality when you need them most!

Gap 0.050″ (1.3mm)
Heat Range 6
Longevity 90,000 miles

 

NGK 7084 BPR6EGP G-Power Platinum Spark Plug

NGK Spark Plugs are tuned for superior acceleration and minimized fuel consumption. Fine wire platinum tipped center electrode provides better starts and prevents spark deviation, while the cut ground electrodes ensure that your NGK will always run smoothly. The best part? You can replace these plugs every 30 months or 100000 miles for increased performance without any internal engine modification!

Gap 0.039″ (1.0mm)
Heat Range 6
Longevity 40,000 miles

 

NGK 7740 PTR5C-13 Laser Platinum Spark Plug

Sale
NGK (7740) PTR5C-13 Laser Platinum Spark Plug, Pack of 1
3 Reviews
NGK (7740) PTR5C-13 Laser Platinum Spark Plug, Pack of 1
  • You can depend on NGK for quality and reliability
  • Constructed from durable material
  • Includes laser welded platinum tip on center electrode and platinum tip on the ground electrode
  • Taper cut reduces the voltage necessary and provides better throttle response
  • Easy installation

Keep your engine running smoothly with these NGK Platinum spark plugs. Tackle any terrain, no matter the conditions, and make it through – just like a boss! Trust in that quality and reliability because our products have got you covered all day long.

Gap 0.054″ (1.37mm)
Engines 4.6l Ford, 3.8l Ford, 5.4l Ford, 3.0l Ford,
Item Weight ‎1.23 ounces

 

NGK 5598 PTR6D-13 Laser Platinum Spark Plug

NGK (5598) PTR6D-13 Laser Platinum Spark Plug, Pack of 1
2 Reviews
NGK (5598) PTR6D-13 Laser Platinum Spark Plug, Pack of 1
  • You can depend on NGK for quality and reliability
  • Constructed from durable material
  • Includes laser welded platinum tip on center electrode and platinum tip on the ground electrode
  • Taper cut reduces the voltage necessary and provides better throttle response
  • Easy installation

The NGK 5598 PTR6D-13 Laser Platinum Spark Plug is made from durable material with a laser-welded platinum tip on the center electrode and platinum tip on the ground electrode. This taper cut reduces the voltage necessary for installation, providing a better throttle response. Guaranteed to get you powered up!

Gap 0.050″ (1.3mm)
Engines 2.0l MZR, 2.3l MZR,
Item Weight 1.23 Ounces
Heat Range 6
Longevity 90k miles

 

NGK 1483 LFR6CGP G-Power Platinum Spark Plug

NGK 1483 LFR6CGP G-Power Platinum Spark Plug
3 Reviews
NGK 1483 LFR6CGP G-Power Platinum Spark Plug
  • Made in China
  • World Wide Leader
  • OEM/OES Manufacturer
  • Package Weight : 0.12 pounds

NGK G-Power Series Platinum Spark Plugs was built to take your car to a whole new level. These spark plugs are made of the same precious platinum that’s often used for jewelry because it offers an unsurpassable quality while still competing with the best prices out there. That means you’ll get all the power, without any deficiencies—and can save on fuel costs too! Now that’s something worth upgrading for.

Gap 0.039″ (1.0mm)
Engines 3.0l EZ30D
Item Weight 0.12 pounds
Heat Range 6
Longevity 40k miles

 

Double-Platinum

Double-platinum spark plugs might be more affordable than iridium ones but are still high-performing and durable. They also don’t compromise efficiency for power as single platinum plugs do.

Champion 7975 REC10PYPB4 Double Platinum Spark Plug

The Champion 7975 REC10PYPB4 Double Platinum Spark Plug is awesome! It’s platinum-tipped, so it lasts longer and does a better job with your spark. That means you can reap the benefits of an even sharper spark. The tapered electrodes in this plug also make sure that your spark gets where it needs to go without dying out halfway down the cylinder.

Gap 0.039″ (1.0mm)
Engines 3.6l EZ36D,
Item Weight
Heat Range 10
Longevity 70k miles

 

Iridium

Best-selling spark plugs contain iridium, which is both a rare and durable metal. Iridium spark plugs offer the best performance boosts for your engine because of their advanced technology – including improved gas mileage with even better reliability. Though these plugs are more expensive than cheaper alternatives, they come out in front regarding longevity and performance.

NGK 91924 ILZNAR8A7G Laser Iridium Spark Plug

NGK ILZNAR8A7G Spark Plug NGK Laser Iridium Spark Plug
2 Reviews
NGK ILZNAR8A7G Spark Plug NGK Laser Iridium Spark Plug
  • This NGK Laser Iridium 91924 Spark Plug replaces Ford DS7G 12405 BA, Ford DS7G-12405-BA, Ford HYFS-094-YEC, Motorcraft SP539, OEM parts and is perfect for replacement or a performance upgrade.
  • REDUCE EMISSIONS AND MISFIRES: This tried-and-true Spark Plug boosts performance, reduces emissions, and enables better fuel economy so that your engine runs at its best. The durable shell reliably protects the spark plug from corrosion, ensuring long-lasting sparking capabilities. The center and ground electrodes promote sharper spark focus for fewer misfires
  • IMPROVE IGNITION AND SPARK EFFICIENCY: This Spark Plug employs advanced center and ground electrodes to produce complete and efficient combustion and deliver an outstanding spark for faster, stronger, and more powerful combustion over the life of the spark plug. The corrosion-resistant center and ground electrodes minimize spark gap growth and provide greater ignitability and spark efficiency
  • RELY ON QUALITY IGNITION COMPONENTS: From their start in 1936 through today, the NGK product line is proof of their dedication to innovation, performance, and quality. In order to deliver high-quality spark plugs and oxygen sensors to the automotive community, NGK has partnered with auto manufacturers to engineer automotive parts that fit both the vehicles of today and of the future
  • TRUST IN NGK NTK: Explore components built by the world leader in the design of spark plugs and oxygen sensors. Their attention to performance excellence is what has differentiated them from the competition and allowed them to be the number one supplier of spark plugs and oxygen sensors. From leading Japanese makers like Honda, Toyota, Mazda, and Nissan to domestic manufacturers like GM, Ford, and Chrysler, NGK Spark Plugs and NTK Sensors are already onboard when you purchase your new vehicle

NGK plugs are totally awesome. Our laser welded, Iridium tipped electrodes will make sure your engine runs without a hitch – the triple gasket seals eliminate gas leakage and with increased durability, they’ll last much longer than our competitors! We don’t waste time or money on gimmicks like platinum discs; we have faith in you as a driver to keep your car running smoothly, but should anything happen, the platinum disc is there for those inconvenient days. The bulb-like shape of these plugs will provide some unprecedented peace of mind.

Gap 0.028″ (0.7mm)
Heat Range 8
Longevity 100,000 miles

 

NGK 90607 ILTR5K13 Laser Iridium Spark Plug

DENSO # 3444 Iridium LONG LIFE Spark Plugs -- SC20HR11 ----- 4 PCS NEW
159 Reviews
DENSO # 3444 Iridium LONG LIFE Spark Plugs -- SC20HR11 ----- 4 PCS NEW
  • FREE SHIPPING to anywhere IN USA and territories For This Item
  • Iridium LONG LIFE
  • DENSO 3444
  • SC20HR11
  • 1order = 4 Pieces

The NGK ILTR5K13 Laser Iridium Spark Plug is the best plug for your car because they’re durable has triple gaskets to stop emissions from escaping and has trivalent metal plating. They will make your engine start faster so you can get on with your day.

Gap 0.050″ (1.3mm)
Heat Range 5
Longevity 100,000 miles

 

NGK 1406 DILKAR7B11 Laser Iridium Spark Plug

DENSO # 3444 Iridium LONG LIFE Spark Plugs -- SC20HR11 ----- 4 PCS NEW
159 Reviews
DENSO # 3444 Iridium LONG LIFE Spark Plugs -- SC20HR11 ----- 4 PCS NEW
  • FREE SHIPPING to anywhere IN USA and territories For This Item
  • Iridium LONG LIFE
  • DENSO 3444
  • SC20HR11
  • 1order = 4 Pieces

NGK 1406 DILKAR7B11 Laser Iridium Spark Plug derives its high-performance characteristics from many revolutionary design features. The pure alumina silicate ceramic insulator provides superior strength and better heat transfer across the spark plug, while the copper core aids in heat removal. In addition to innovative features such as corrugated ribs that prevent flashover, NGK’s triple seals prevent leakage – making it a favorite among knowledgeable drivers everywhere!

Gap 0.043″ (1.1mm)
Heat Range 7
Longevity 100,000 miles

 

Denso 3444 SC20HR-11 Iridium Long Life Spark Plug

DENSO # 3444 Iridium LONG LIFE Spark Plugs -- SC20HR11 ----- 4 PCS NEW
159 Reviews
DENSO # 3444 Iridium LONG LIFE Spark Plugs -- SC20HR11 ----- 4 PCS NEW
  • FREE SHIPPING to anywhere IN USA and territories For This Item
  • Iridium LONG LIFE
  • DENSO 3444
  • SC20HR11
  • 1order = 4 Pieces

Denso iridium long-life spark plugs are sourced for their exceptional strength, high quality, and affordability. Our Denso spark plugs have exceptionally durable 100% pre-fired platinum tips with a fine wire 0.7 mm center electrode to ensure that your luxury car is running at its best performance possible. Make the switch to our premium products today!

Gap 0.043″ (1.1mm)
Heat Range 20
Longevity 80k-100k miles

 

NGK 92182 LTR6BI-9 Laser Iridium Spark Plug

NGK 92182 LTR6BI-9 Laser Iridium Spark Plug
7 Reviews
NGK 92182 LTR6BI-9 Laser Iridium Spark Plug
  • Laser welded Iridium center electrode tip ensures high durability and greater spark
  • Platinum disc welded to backside of ground electrode provides long life
  • Longer insulator nose prevents fouling, Corrugated ribs on insulator prevents flashover, and the triple gasket seal eliminates combustion gas leakage
  • Faster starts and quicker acceleration
  • Better fuel economy and lower emissions, Trivalent Metal Plating for superior anti-corrosion and anti-seizing

Iridium is great, it’s gorgeous and strong – just like you. These spark plugs by NGK are made with a laser-welded Iridium center electrode and a platinum disc welded to the backside of the ground electrode for better longevity and protection against fouling. This plug also has a longer insulator nose that can’t be cracked or deformed from extreme heat or pressure. Want your car tuned up? These plugs will get her ready for any starting day ahead!

Gap 0.035″ (0.9mm)
Heat Range 6
Longevity 100,000 miles

 

NGK 93593 SILZNAR8C7H Laser Iridium Spark Plug

NGK 93593 Spark Plug
15 Reviews
NGK 93593 Spark Plug
  • 100% genuine NGK Spark plug from NGK factory
  • Anti-counterfeit query method for NGK spark plug
  • 1. the thread workmanship, the ceramic body and the metal body connecting part of the white powder, can be wiped out by hand, powder is sealed washer stamping into the special,if it's fake,is intentionally sticky with glue, so cannot be wiped.
  • 2.spark plug metal parts or ceramic and metal joint position has a four digit number, this is the production batch, you can call the manufacturer to inquire.
  • 3. the licensed products have stickers on the single package of the products. The oval white sticky paper is marked on the production area, importers, enterprise standards and so on.

Keep your engine running smoothly with this genuine NGK spark plug, sourced from the factory in Japan. Your lucky day!

Gap 0.028″ (0.7mm)
Item Weight 1.23 ounces
Heat Range 8
Longevity 100,000 miles

 

NGK 96588 LTR6DI-8 Laser Iridium Spark Plug

Sale
NGK 96588 LTR6DI-8 Laser Iridium Spark Plug
7 Reviews
NGK 96588 LTR6DI-8 Laser Iridium Spark Plug
  • Many products require vehicle-specific fitment
  • View the Compatibility table to ensure the part fits your year, make, model and submodel
  • Please reference the submodel information located on the far left within the Compatibility table under "Notes"
  • Please note: Due to our high sales volume, it may take up to 2-business days for us to reply to all questions and/or requests.
  • We do not offer shipping to APO/FPO

Laser welded Iridium center electrode tip ensures high durability and greater spark. The Platinum disc welded to the backside of the ground electrode provides long life, while a longer insulator nose prevents fouling (never worry about checking your plugs again!).

Corrugated ribs on the insulator prevent flashover and a triple gasket seal eliminates combustion gas leakage. With NGK 96588 LTR6D-8, you’ll enjoy faster starts, quicker acceleration; better fuel economy with lower emissions; an industry first in Trivalent Metal Plating for superior anti-corrosion and anti-seizing properties for top engine performance – so buy it now or regret it later!”

Gap 0.031″ (0.8mm)
Item Weight 1.58 ounces
Heat Range 6
Longevity 100,000 miles

 

Denso 3442 FXE22HR-11 Iridium Long Life Spark Plug

Sale
Denso 3442 Spark Plug
81 Reviews
Denso 3442 Spark Plug
  • Denso # 3442
  • Extra Long Life Iridium Plug
  • 0.5 mm Fine Wire Iridium Center Electrode
  • 0.7 mm Platinum Needle Tipped Ground Electrode

Engine starting has never been easier. Live life on the road with these long-lasting plugs that never let you down and don’t give up on you when other spark plug brands might backfire halfway through the journey. Known for superior quality and reliability, Denso is your one stop shop to getting every ride off on a smooth start.
End description: Get yourself some of those Denso 3442s today — they’ll be there for years during all sorts of hard use without stopping!

Gap 0.043″ (1.1mm)
Heat Range 22
Longevity 80k-100k miles

 

NGK 6240 PLFR5A-11 Laser Platinum Spark Plug

Sale
NGK 6240 Spark Plug
450 Reviews
NGK 6240 Spark Plug
  • Trivalent Metal Plating Provides Superior Anti-Corrosion and Anti-Seizing Properties
  • Corrugated Ribs Prevent Flashover
  • Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat Transfer
  • Copper Core Aids in Heat Removal
  • Triple Seals Prevent Leakage; Torque Specs: Cast Iron: 18-25.3 lb. ft; Overall Height : height of the spark plug from the seat to the top of the terminal nut is 50.5mm (1.98-inch)

NGK Laser Platinum Spark Plugs are designed for dependability and reliability, with some of the highest standards in quality. The trivalent metal plating provides long-lasting durability to extend the life of your spark plug. Made with fully shielded wiring to prevent water from entering into any electrical terminals ensuring a longer life span in moist climates. With features like triple seals to avoid leakage and torque specs cast iron 18-25 lb ft,

Gap 0.043″ (1.1mm)
Heat Range 5
Item Weight 0.811 ounces
Longevity 90,000

 

NGK 92145 LZFR5CI-11 Laser Iridium Spark Plug

NGK LZFR5CI-11 Laser Iridium Spark Plug (92145 Laser Iridium), 4 Pack
11 Reviews
NGK LZFR5CI-11 Laser Iridium Spark Plug (92145 Laser Iridium), 4 Pack
  • Laser welded iridium center electrode tip ensures high durability and greater spark
  • Platinum disc welded to backside of ground electrode provides long life
  • Longer insulator nose prevents fouling, corrugated ribs on insulator prevents flashover, and the triple gasket seal eliminates combustion gas leakage
  • Faster starts and quicker acceleration
  • Better fuel economy and lower emissions, trivalent metal plating for superior anti-corrosion and anti-seizing

The NGK 92145 LZFR5CI-11 Laser Iridium Spark Plug is the perfect thing for you if you’re in need of something to make your vehicle more fuel-efficient. Be prepared for faster acceleration and less wasted energy being lost out of your car’s exhaust with this product! The triple gasket seal inside the plug will prevent gas from escaping so that a quality spark can be delivered on-demand. As a thank you, we’ll also include our lifetime warranty with purchase.

Gap 0.043″ (1.1mm)
Heat Range 5
Item Weight 7.8 ounces
Longevity 100,000 miles

 

Denso 4709 IW20TT Iridium TT Spark Plug

Denso (4709) IW20TT Iridium TT Spark Plug, (Pack of 1)
6 Reviews
Denso (4709) IW20TT Iridium TT Spark Plug, (Pack of 1)
  • Denso # 4709
  • 0.4mm Iridium Center Electrode
  • 0.7mm Platinum Ground Electrode
  • Larger spark translates to more power and superior fuel economy
  • 0.4 mm iridium center electrode: world's smallest diameter that maximizes firing potential

DENSO 4709 Iridium TT Spark Plugs work hard to maximize your engine’s potential by maximizing power. This product provides the world’s smallest iridium center electrode and a platinum ground electrode that ensures peak combustion efficiency, which generates more power.

With DENSO 360 degree laser-welded plugs, there is less heat quenching and less emission of hydrocarbons. Not only are our Denso iridium spark plugs easy to install, but they are also known for providing up to 40% better fuel economy than conventional copper core plug types.

Gap 0.039″ (1.0mm)
Heat Range 20
Longevity 100,000 miles

 

NGK 6637 BPR6EIX Iridium IX Spark Plug

Sale
NGK # 6418 Iridium Spark Plugs BKR6EIX - 4 PCS NEW
293 Reviews
NGK # 6418 Iridium Spark Plugs BKR6EIX - 4 PCS NEW
  • FREE SHIPPING to anywhere IN USA and territories For This Item
  • Better Performance
  • Good Brand Name NGK
  • IRIDIUM
  • 1order = 4 Pieces

The NGK 6637 BPR6EIX Iridium IX Spark Plug is engineered to provide reliable starts and prevent over-heating by using a high-performance trivalent plating, with 98% pure copper core and cold-rolled threads. With standards of tapered cut ground electrode for improved ignitability and reduced quenching, these plugs are the perfect ones to use!

Gap 0.031″ (0.8mm)
Heat Range 6
Longevity 50,000 miles

 

NGK 6418 BKR6EIX Iridium IX Spark Plug

Sale
NGK # 6418 Iridium Spark Plugs BKR6EIX - 4 PCS NEW
293 Reviews
NGK # 6418 Iridium Spark Plugs BKR6EIX - 4 PCS NEW
  • FREE SHIPPING to anywhere IN USA and territories For This Item
  • Better Performance
  • Good Brand Name NGK
  • IRIDIUM
  • 1order = 4 Pieces

Get ready to see a new side of performance with these plugs. With their innovative design, you’ll ignite your engine easier and more consistently than ever before. And the increased durability will keep that spark right where it needs to be – all throughout race season! So fire up some races with NGK IX Iridium plugs.

Gap 0.031″ (0.8mm)
Item Weight 0.01 ounces
Heat Range 6
Longevity 50,000 miles

 

NGK 6507 IFR6B Laser Iridium Spark Plug

Make no mistake, when you need a spark plug to work as well as possible and last for the longest time, NGK IFR6B Laser Iridium Spark Plugs are some of the best. The laser-welded iridium center electrode tip ensures high durability and greater spark. A platinum disc is welded to the backside of the ground electrode which provides long life and seals against combustion gas leakage.

Equipped with an extra-long insulator nose prevents fouling, corrugated ribs on the insulator prevent flashover, and three tight gaskets seal it all in place so that you can have fast starts and quicker acceleration without all the carbon or other deposits that may gum up your engine’s plugs–so say goodbye to rough idles too!

Gap 0.031″ (0.8mm)
Item Weight ‎0.353 ounces
Heat Range 6
Longevity 100,000 miles

 

NGK 3656 LZFR6AI Laser Iridium Spark Plug

These NGK laser iridium spark plugs provide superior ignitability and long service life. The fine wire iridium tipped center electrode and the fine wire platinum tipped ground electrode helps prevent wear, ensuring stable idle, providing better fuel efficiency and lower emissions.

With only a single material to build from, these plugs have the best corrosion-resistant flashover protection in its class. These plugs are rated at 40 degrees F higher than other material type plugs for increased performance against deposits on combustion chambers and improved anti-serious features. What more could you ask for?

Gap 0.031″ (0.8mm)
Item Weight 0.16 ounces
Heat Range 6
Longevity 100,000 miles

 

NGK 4867 IFR6B-K Laser Iridium Spark Plug

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Autolite XP5683 Iridium XP Spark Plug, Pack of 1
83 Reviews
Autolite XP5683 Iridium XP Spark Plug, Pack of 1
  • Iridium-enhanced center electrode provides better durability
  • 0.6 mm fine wire design offers more focused ignition
  • Nickel-plated shell
  • Proprietary platinum side wire technology
  • Better overall ignitability and optimum performance

The NGK 4867 IFR6B-K Laser Iridium Spark Plug is the perfect tool to get your engine running at its best. This tried and true spark plug boosts performance, reduces emissions, and enables better fuel economy so that your engine runs at its best. The durable shell will reliably protect the spark plug from corrosion so it lasts long. If you want sharper sparks for fast combustion with fewer misfires, this is the right product for you!

Gap 0.031″ (0.8mm)
Item Weight 7 ounces
Heat Range 6
Longevity 100,000 miles

 

Autolite XP5683 XP Iridium Spark Plug

Sale
Autolite XP5683 Iridium XP Spark Plug, Pack of 1
83 Reviews
Autolite XP5683 Iridium XP Spark Plug, Pack of 1
  • Iridium-enhanced center electrode provides better durability
  • 0.6 mm fine wire design offers more focused ignition
  • Nickel-plated shell
  • Proprietary platinum side wire technology
  • Better overall ignitability and optimum performance

The Autolite XP5683 Iridium XP Spark Plug is here to boost your engine’s performance and improve overall ignitability. The platinum-plated side wire technology offers optimum performance, while the nickel-plated shell ensures it lasts for a lot of miles on the road.

This spark plug comes with a lifetime warranty so you’ll never need to worry if you’re protected against faulty parts or accidents that could be covered under warranty. Stop by today and see what this great product can do for your vehicle!

Gap 0.045″ (1.15mm)
Item Weight 0.353 ounces
Heat Range 5
Longevity 100,000 miles

 

Denso 3457 FXE24HR-11 Iridium Long Life Spark Plug

Denso (3457) FXE24HR11 Iridium Long-Life Spark Plug, (Pack of 1)
60 Reviews
Denso (3457) FXE24HR11 Iridium Long-Life Spark Plug, (Pack of 1)
  • Package Dimensions: 2.286 H x 9.144 L x 2.54 W (centimetres)
  • Virtually no electrode wear
  • Package Weight: 0.100 pounds
  • Country of Origin : Japan

Denso iridium long-life spark plugs are the top of the line. You need something with reliable, durable features and material, so these will be a great fit for you if that’s what you’re looking for.

Gap 0.043″ (1.1mm)
Item Weight 1.28 ounces
Heat Range 24
Longevity 80k-100k miles

 

NGK 90174 DF8H-11B Laser Iridium Spark Plug

NGK 90174 DF8H-11B Laser Iridium Spark Plug
53 Reviews
NGK 90174 DF8H-11B Laser Iridium Spark Plug
  • Fit type: Vehicle Specific
  • Package Dimensions: 10.6 H x 2.1 L x 2.8 W (centimeters)
  • Package Weight: 0.042 kilograms
  • Country of Origin : Japan

Maintain your engine’s performance with this NGK 90174 DF8H-11B Laser Iridium Spark Plug. We use advanced technology to create plugs that are lightning-quick starters and prevent fouling.

Gap 0.043″ (1.1mm)
Item Weight 0.64 ounces
Engines 3.7l VQ37VHR,
Heat Range 8
Longevity 100k miles

 

NGK 3692 TR65IX Iridium IX Spark Plug

Sale
NGK TR65IX (3692) Iridium IX Spark Plug, Pack of 1
2 Reviews
NGK TR65IX (3692) Iridium IX Spark Plug, Pack of 1
  • Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling
  • The 0. 6mm laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical Quenching Effect
  • Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage
  • Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high-performance engines
  • Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties

Iridium IX plugs are designed specifically for performance enthusiasts. Perfect for you if your engine needs some major help, Iridium offers a spark that is much more responsive and durable than standard plugs. And when combined with NGK 3692 TR65IX Gaskets and Covers, you can be sure to get the maximum performance out of your vehicle.

Gap 0.059″ (1.5mm)
Engines 2.0l MZR, 2.3l MZR,
Item Weight ‎1.44 ounces
Heat Range 6
Longevity 50k miles

 

NGK 94702 DF6H-11A Laser Iridium Spark Plug

NGK Laser Iridium 94702 DF6H-11A Laser Iridium Spark Plug, 4 Pack
75 Reviews
NGK Laser Iridium 94702 DF6H-11A Laser Iridium Spark Plug, 4 Pack
  • Laser welded iridium center electrode tip ensures high durability and greater spark
  • Platinum disc welded to backside of ground electrode provides long life
  • Longer insulator nose prevents fouling, corrugated ribs on insulator prevents flashover, and the triple gasket seal eliminates combustion gas leakage
  • Faster starts and quicker acceleration
  • Better fuel economy and lower emissions, trivalent metal plating for superior anti-corrosion and anti-seizing

Always have a Misfire? You need to spark things up. Get NGK Laser Iridium 94702 DF6H-11A Iridium Spark Plugs today! The center electrode is laser welded for your ultimate durability and high resistance to fouling. This product also comes with a platinum disc welded onto the backside of ground electrodes which provides greater life, triple gasket seal eliminates any combustion gas leakage, and a ribbed design on the insulator part keeps you from firing off too quickly. Faster starts, quicker acceleration, better fuel economy and low emissions are just some of this product’s perks!

Gap 0.044″ (1.11 mm)
Engines 2.5l QR25DE,
Item Weight ‎0.16 ounces

 

NGK 4344 LTR5IX-11 Iridium IX Spark Plug

Iridium IX plugs are designed for maximum performance and your engine is sure to love them! These innovative plugs come with a durable center electrode, corrosion-resistant trivalent metal plating, heat insulated pure alumina silicate ceramic insulators, and stay-cool corrugated ribs. The patented design has it all!

Gap 0.043″ (1.1mm)
Engines 2.5l MZR,
Item Weight ‎6.4 ounces
Heat Range 5
Longevity 50k Miles

 

NGK 6481 ILFR6B Laser Iridium Spark Plug

NGK 6481 Ilfr6B Laser Iridium Spark Plug
1 Reviews
NGK 6481 Ilfr6B Laser Iridium Spark Plug
  • You can depend on NGK for quality and reliability
  • Better Center Electrode Anti-Oxidation and Anti-Erosion
  • Improved Ignition

This NGK 6481 ILFR6B Laser Iridium Spark Plug is the best of its kind on the market. Make sure that you’re not using anything less than a high-quality product like this one – NGK knows your engine deserves only the best.

Gap 0.031″ (0.8mm)
Engines
Item Weight 1.92 ounces
Heat Range 6
Longevity 100k miles

 

NGK 97287 ITR5H13 Laser Iridium Spark Plug

NGK 97287 Spark Plug
  • Product Type:Spark Plug
  • Item Package Dimension:3.43 " L X0.98 " W X0.89 " H
  • Item Package Weight:0.1 lbs
  • Country Of Origin: Japan
  • Better Fuel Economy And Lower Emissions, Trivalent Metal Plating For Superior Anti-Corrosion And Anti-Seizing

NGK 97287 spark plugs are designed to last, thanks to their patented laser iridium tips. The trivalent metal plating provides superior anti-corrosion and anti-seize protection that helps reduce the risk of engine damage due to lack of adherence. These iridium spark plugs are ideal for high-performance engines as they provide better fuel economy and lower emissions than other different grades of plug wire products available on the market today.

Gap 0.054″ (1.37 mm)
Engines 4.6l Ford Mustang, 3.0l Ford Fusion,
Item Weight 0.16 ounces

 

Denso 3499 Spark Plug Iridium Long-Life

You’re not living life in the fast lane, but your engine deserves to. The one and only Denso 3499 is just for you.

The iridium core of this spark plug will deliver unbeatable power, performance, and longevity with its 1.1 millimeter gap size that’s perfect for any modern car’s engine.

Gap 0.044″ (1.11 mm)
Engines 2ZR-FAE,
Item Weight 1.44 ounces

 

NGK 91418 ILTR5E11 Laser Iridium Spark Plug

NGK is the number one spark plug of choice for many carmakers like Subaru and Acura, as well as racer teams – it’s also (not surprisingly) the world’s number one spark plug. These plugs are made with an iridium center electrode giving a wider view of ionized air that ensures better combustion on start-up.

Gap 0.043″ (1.1mm)
Engines 6.2l LT1, 6.2l LT4,
Item Weight ‎0.634 ounces
Heat Range 5
Longevity 100k Miles

 

NGK SILZKAR7B11 Laser Iridium Spark Plug

All of the NGK SILZKAR7B11 Laser Iridium Spark Plug’s peaks and valleys are laser welded to ensure durability, as well as a platinum disc welded to the backside of the ground electrode for longevity. The long insulator nose will never foul, the corrugated ribs prevent flashover, and the triple gasket seal eliminates fuel leakage. It may not be able to create rainbows on command like those sparklers we bought at that Parade you dragged me to last Fourth but it’ll get your car purring like nothing else!

Gap 0.043″ (1.1mm)
Engines 2.5l FB25,
Item Weight 1.41 ounces
Heat Range 7
Longevity 100k miles

 

NGK 7505 SILFR6C11 Laser Iridium Spark Plug

NGK 7505 SILFR6C11 Laser Iridium Spark Plug
  • OEM/OES Manufacturer
  • High Quality
  • World Wide Leader

The NGK 7505 SILFR6C11 Laser Iridium Spark Plug is an investment in your car. With this spark plug, you’ll see reduced emissions, improved fuel efficiency and better idle. It comes with a triple seal to prevent leakage so you don’t have to worry about corrosion happening on the inside of your engine. Keep your engine running at its best while driving (or racing) with these excellent quality spark plugs!

Gap 0.043″ (1.1mm)
Engines 3.6l EZ36D,
Item Weight ‎1.92 ounces
Heat Range 6
Longevity 100k miles

 

NGK 3764 BKR6EIX-11 Iridium IX Spark Plug

NGK 3764 IX Iridium Series spark plugs were designed specifically for the person who needs their engines to run smoothly with a little extra pep. We’ve made sure that your NGK plug will be able to put out an even, consistent spark while being more durable than many competitors’ plugs.

The NGK ultra-fine center electrode ensures that you get a reliably stable spark without having to worry about whether they’ll need another replacement too soon, and our Iridium alloy is so dense it’s perfect for today’s high-tech truck environment. Not only does this improve speed and reduce wear on your engine parts, but it also makes them less prone to corrosion.

Gap 0.043″ (1.1mm)
Engines 2.5l EJ25, 2.4l 2AZ-FE,
Item Weight
Heat Range 6
Longevity 50k miles

 

NGK 93501 LKAR7BIX-11S Iridium IX Spark Plug

Long story short, these plugs last a long time and they’re great. These plugs are designed for performance enthusiasts who want to go the extra mile in terms of optimizing their car and have always been able to stop worrying about whether or not they’ll make it an entire quarter mile before their spark plug goes out.

In addition, Iridium IX is resistant to electrical wear and doesn’t break down after just one high-performance driving session. The included 1/4″ hex wrench makes removing your lug nuts super easy so you can set up your tire without any hassle.

Gap 0.043″ (1.1mm)
Item Weight 4.8 ounces
Engines 2.0l SkyActiv, 2.5l SkyActiv,
Heat Range 7
Longevity 50k Miles

 

Genuine Mazda PE5R-18-110 Iridium Spark Plugs

Sale
Set Of 4 Genuine Mazda PE5R-18-110 Iridium Spark plugs for Mazda 3 Mazda 6 Mazda CX-3 Mazda CX-5 Mazda MX-5 Miata
23 Reviews
Set Of 4 Genuine Mazda PE5R-18-110 Iridium Spark plugs for Mazda 3 Mazda 6 Mazda CX-3 Mazda CX-5 Mazda MX-5 Miata
  • Vehicle Fitment : Mazda MX-5 Miata 2016 - 2019 Club, Grand Touring, RF Club, RF GT, RF Grand Touring, Sport, Launch Edition // 2.0L L4 - Gas
  • Mazda 3 2012 - 2018 Grand Touring, Sport, Touring, I Sport, I Touring, i Grand Touring, s Grand Touring, s Touring, Mazdaspeed, S, i // 2.0L L4 - Gas, 2.3L L4 - Gas, 2.5L L4 - Gas
  • Mazda 6 2014 - 2019 Sport, Touring , Grand Touring // 2.5L L4 - Gas
  • Mazda CX-3 2016 - 2019 Grand Touring, Sport, Touring // 2.0L L4 - Gas
  • Mazda CX-5 2013 - 2019 Grand Touring, Grand Touring Reserve, Signature, Sport, Touring // 2.0L L4 - Gas, 2.5L L4 - Gas
Gap 0.043″ (1.1mm)
Engines 2.0l SkyActiv, 2.5l SkyActiv,

 

NGK 90083 LTR5BI-13 Laser Iridium Spark Plug

NGK 90083 LTR5BI-13 Laser Iridium Spark Plug
263 Reviews
NGK 90083 LTR5BI-13 Laser Iridium Spark Plug
  • Laser welded Iridium center electrode tip ensures high durability and greater spark
  • Package Dimensions: 2.286 H x 2.54 L x 9.398 W (centimeters)
  • Package Weight: 0.045 kilograms
  • Country of Origin : Japan

The NGK Spark Plug is the highest quality plug on the market. Made in Japan, this plug lasts triple as long as most plugs with a laser welded Iridium center electrode tip which provides higher durability and greater spark.

Gap 0.050″ (1.3mm)
Engines 2.0l MZR,
Item Weight ‎1.6 ounces
Heat Range 5
Longevity 100k miles

 

Denso 3442 FXE22HR-11 Iridium Long Life Spark Plug

Bosch Automotive 9621 Double Iridium OE Replacement Spark 4X Longer Life (1 Pk) Lexus CT0h, Mazda: CX, MX-5, 3, Sport, 6, Scion: iA, iQ, xD, Toyota: Corolla, iM, Matrix, Prius, Plug-in, V, Yaris
11,695 Reviews
Bosch Automotive 9621 Double Iridium OE Replacement Spark 4X Longer Life (1 Pk) Lexus CT0h, Mazda: CX, MX-5, 3, Sport, 6, Scion: iA, iQ, xD, Toyota: Corolla, iM, Matrix, Prius, Plug-in, V, Yaris
  • Double Iridium firing pin and ground electrode inlay provide 4X longer service life compared to standard copper plugs
  • 0.6mm fine wire firing pin provides superior ignitability and performance
  • 360 Degree continuous laser weld fuses corrosion resistant iridium firing pin to base for increased durability
  • Original equipment, pre-gapped replacement delivering optimum fit, form and function
  • 11-15 Lexus CT0h, 16- Mazda CX-3, 17-18 Mazda CX-5, 16- Mazda MX-5 Miata, 13,15-18 Mazda 3, 15-18 Mazda 3 Sport, 14-18 Mazda 6, 09-10 Pontiac Vibe, 16 Scion iA, 12-14 Scion iQ, 13-14 Scion xD, 13- Toyota Corolla

I bet you’re happy to see these genuine Denso iridium long-life spark plugs. These are the same spark plug found in luxury vehicles! Not only do they have 0.7mm iridium tipped laser welded fine wire center electrode and platinum-tipped ground electrode, unlike traditional nickel-plated steel that corrodes over time and wears down electrodes, but they also come with machine-rolled threads preventing seizing or cross-threading during installation and removal which prevents your engine from catching on fire – we can’t risk our drivers having a bad morning commute now can we? And what about overheating engines after sitting in traffic for too long?

Gap 0.043″ (1.1mm)
Engines 2.5l FB25,
Item Weight
Heat Range 8
Longevity 80k-100k miles

 

Double-Iridium

If durability is your main concern, then double-iridium spark plugs are the best spark plug on the market. They do not just provide an average service life; they can last up to four times as long. In addition, Double-iridium’s unique structure delivers the firepower you need for every condition under which you drive: heat or high speeds, even extreme conditions like icing.

Bosch 9621 VR7NII33X 0242135529 Double Iridium Spark Plugs

Bosch Automotive 9621 Double Iridium OE Replacement Spark 4X Longer Life (1 Pk) Lexus CT0h, Mazda: CX, MX-5, 3, Sport, 6, Scion: iA, iQ, xD, Toyota: Corolla, iM, Matrix, Prius, Plug-in, V, Yaris
11,695 Reviews
Bosch Automotive 9621 Double Iridium OE Replacement Spark 4X Longer Life (1 Pk) Lexus CT0h, Mazda: CX, MX-5, 3, Sport, 6, Scion: iA, iQ, xD, Toyota: Corolla, iM, Matrix, Prius, Plug-in, V, Yaris
  • Double Iridium firing pin and ground electrode inlay provide 4X longer service life compared to standard copper plugs
  • 0.6mm fine wire firing pin provides superior ignitability and performance
  • 360 Degree continuous laser weld fuses corrosion resistant iridium firing pin to base for increased durability
  • Original equipment, pre-gapped replacement delivering optimum fit, form and function
  • 11-15 Lexus CT0h, 16- Mazda CX-3, 17-18 Mazda CX-5, 16- Mazda MX-5 Miata, 13,15-18 Mazda 3, 15-18 Mazda 3 Sport, 14-18 Mazda 6, 09-10 Pontiac Vibe, 16 Scion iA, 12-14 Scion iQ, 13-14 Scion xD, 13- Toyota Corolla

Bosch double iridium spark plugs are longer lasting and more reliable than copper. With a smaller firing pin with 450% higher voltage to make sure the engine starts on cold days, Bosch has you covered. These plugs also come with a 7-year performance satisfaction guarantee!

Gap 0.043″ (1.1mm)
Engines 2.0l SkyActiv,
Item Weight 1.44 ounces
Heat Range 7
Longevity 100k miles

 

Bosch 96302 HR8MII33V 0242230612 Double Iridium Spark Plug

Bosch 96302 Double Iridium Spark Plug (4X Longer Service Life), 1 Pack
311 Reviews
Bosch 96302 Double Iridium Spark Plug (4X Longer Service Life), 1 Pack
  • Double Iridium firing pin and ground electrode inlay provide 4X longer service life compared to standard copper plugs
  • 0.6mm fine wire firing pin provides superior ignitability and performance
  • 360 Degree continuous laser weld fuses corrosion resistant iridium firing pin to base for increased durability
  • 7 year performance satisfaction guarantee
  • Original equipment, pre-gapped replacement delivering optimum fit, form and function

The new Bosch 96302 Double Iridium spark plugs are designed for all vehicles and offer a 4x longer service life, increased ignition performance and durability. Not only will they last 50% more than the average lifespan of a copper plug but you can trust that they will be pre-gapped to fit your vehicle perfectly so you have no need to worry about anything else.

With our 7-year performance satisfaction guarantee, original equipment quality, and 13-18 Ford C-Max certified plugs, these are the long-term plugs that’ll provide optimum fit, form and function in all parts of your engine. Stop messing around with subpar brands from generic stores when we’ve got what you’re looking for right here!

Gap 0.050″ (1.3mm)
Engines 2.0l MZR,
Item Weight 1.73 ounces
Heat Range 8
Longevity 100k miles

 

Key Features

 

Material

When choosing a spark plug, you should consider what type of material suits your needs. Copper is best suited for older model cars that use low-voltage distributor ignition systems. Platinum and iridium are great options for modern cars without distributors.

Iridium is a better option in the long run, but it costs more than platinum – which comes with an economy/performance/longevity mix that works well in most situations. Choose the flame plugs specified by your car’s manufacturer when possible since other factors may affect performance or longevity if you don’t use those specific plugs specifications for your vehicle fleet.

 

Size

Thread size for spark plugs is determined by threaded length and diameter. Standard thread lengths for Americanised autos are 10mm, 12mm, 14mm, and 18mm diameters. Higher thread sizes can also be used with custom-made fittings or adapter taps in hand taps; e.g., a car may have a metric BTR equivalent of 2 standard threads if it has a 20 mm diameter display on the dashboard near the driver’s position.

 

Heat range

In the world of spark plugs, some are “hot,” and others are “cold.” The heat range is indicated using some letters; ascending numbers correspond to hot spark plugs while descending numbers correspond to cold ones.

 

Gap Style

The best spark plug is a complex element that can vary in its application, but the typical range of size is between 0.6 and 1.8 millimeters (0.024 and 0.071 inches). As always, measure before installation to ensure you are within the specified range for your car model or another vehicle with which it will be used.

 

How often do I need to Change my Spark Plugs?

One of the biggest factors in determining when to change a spark plug is its operating environment and usage. For most modern cars, once they are over 80-100 thousand miles, it might be time for new ones. Custom-built engines that require high output can also need replacement at a higher frequency and race engines where performance numbers dictate more frequent changes.

Changing spark plugs in a conventional modern vehicle can seem daunting to uninitiated. Thankfully, all relevant instructions and steps for making the change are usually laid out in your car owner’s manual. In addition, the manual typically stipulates the frequency of change and appropriate plugs. Remember that you should make this swap before any decrease in engine performance is noticed or worse— despite contentions from some mechanics!

Changing spark plugs at or before their factory service interval is critical. It can lead to reduced performance, additional strain or damage to other ignition system components and the rapid accumulation of gunk and soot within the engine if they are not changed. In addition, plugs overdue for replacement often cause snowballing problems with engine durability, performance, and fuel mileage—and changing them at their advised intervals is best.

To maintain the optimal performance of your car, make sure you change all three areas: spark plugs, air filter and fuel filter.

 

5 Things You Should Know About Spark Plugs

Anti-seize

NGK spark plugs are trivalent plated, which provides a resistant finish against corrosion. The coating is designed to protect the threads of the plug from moisture and chemicals. In addition, NGK plugs stay in place throughout removal because of this coating. They come pre-assembled dry without lubrication or anti-seize for extra protection and care during assembly time as well as when on your vehicle.

Anti-seize can augment torque by up to 20%, increasing the risk of spark plug thread breakage. Thread damage is sometimes so severe as to require the removal of a cylinder head. In addition, heat rating and metal shell stretch can be altered, resulting in serious engine malfunction caused by preignition or premature detonation. NGK spark plugs should not be lubricated with anti-seize; it is detrimental to the product and unnecessary for function purposes.

Corona stain

Corona stain is created when the voltage on a spark plug jumps high enough to magnetize particles in the surrounding air, which are attracted to the ceramic insulator.

Gapping fine-wire spark plugs

NGK recommends that spark plug gaps be set to the factory preset gap, or as close to +/- 0.008” from it as necessary.

Torque

Properly installing a spark plug is essential in engine performance. Follow the recommended torque specification every time to prevent excessive vibration and improper heat dissipation, causing spark plugs and/or engines damage. If you cannot follow the recommended torque specifications, then make sure to under-torque it by a specified amount (e.g., 1 turn) for safety purposes.

Over torquing can lead to thread damage, compromised seals and gas leakage, metal shell stretch or compression fractures leading to inefficient heat dissipation, which may cause pre-ignition of the combustion chamber.

“Copper spark plugs”

A “copper spark plug” is often used to describe a standard material spark plug. However, this terminology is incorrect as copper cannot be used for electrodes; they would wear out very quickly. A standard material plug includes nickel-alloy with optional copper core increasing heat dissipation and durability by lowering the electrode temperature.

NGK spark plugs offer copper cores to help them withstand the intense heat of combustion, as well as superior electrode materials.

Last update on 2021-09-23 / Affiliate links / Images from Amazon Product Advertising API