Best Synthetic Motor Oil 2021


Disclosure: we may earn a small commission from the companies mentioned in this post via affiliate links to products. This doesn't make any additional cost to you. All products are selected independently.

Best Full Synthetic Oil 5w30

SaleNo. 1
Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil 5 QT
14,864 Reviews
Valvoline Advanced Full Synthetic SAE 5W-30 Motor Oil 5 QT
  • Innovative anti-wear additives provide 40% more wear protection than industry standards as tested in the industry Sequence IVA wear test
  • Full synthetic formula for exceptional high and low temperature protection
  • Extra detergents help fight sludge and deposits
  • Superior antioxidants resist motor oil breakdown in extreme conditions
SaleNo. 2
Valvoline High Mileage with MaxLife Technology SAE 5W-30 Synthetic Blend Motor Oil 5 QT
4,861 Reviews
Valvoline High Mileage with MaxLife Technology SAE 5W-30 Synthetic Blend Motor Oil 5 QT
  • Enhanced anti-wear additives deliver a thick & durable layer of anti-wear film to help prevent auto engine breakdown
  • Added detergents help protect against sludge and deposits
  • Premium seal conditioners help treat and prevent leaks
  • Superior antioxidants resist motor oil breakdown in extreme conditions
SaleNo. 3
Mobil 1 120764 5W-30 Synthetic Motor Oil - 5 Quart
16,281 Reviews
Mobil 1 120764 5W-30 Synthetic Motor Oil - 5 Quart
  • Helps Extend Engine Life By Working To Prevent Damaging Deposits And Sludge Buildup
  • Mobil 1 Advanced Full Synthetic Motor Oil 5W-30 Helps To Protect Your Engine From The Five Factors That Can Damage Engines Over Time
  • Helps To Protect Critical Engine Parts For Up To 10,000 Miles Between Oil Changes, Controlling Oxidation To Prevent Oil Breakdown And Maintaining Excellent Viscosity
  • Meets Ilsac Gf-6 Standards To Help Provide Low-Speed Pre-Ignition (Lspi) And Timing Chain Wear Protection While Keeping Your Engine Clean And Helping To Improve Your Fuel Economy

 

Best Synthetic Oil 5w40

SaleNo. 1
Valvoline European Vehicle Full Synthetic SAE 5W-40 Motor Oil 5 QT
686 Reviews
Valvoline European Vehicle Full Synthetic SAE 5W-40 Motor Oil 5 QT
  • Excellent engine cleanliness through superior sludge and varnish protection
  • Outstanding high-temperature protection under severe driving conditions
  • Superior cold-temperature protection through faster oil flow at start-up
  • Meets the performance requirements of most European naturally aspirated and turbocharged passenger cars operating in North America
No. 2
Amazon Basics Full Synthetic Motor Oil, 5W-40, Euro Formula, 1 Quart, 6 Pack
24,913 Reviews
Amazon Basics Full Synthetic Motor Oil, 5W-40, Euro Formula, 1 Quart, 6 Pack
  • For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
  • Formulated for longer drain intervals
  • Helps prevent build up that can cause rust and corrosion
  • Reduces friction for less engine wear
  • High resistance to viscosity and thermal breakdown
SaleNo. 3
Castrol 06249 Edge 5W-40 Advanced Full Synthetic Motor Oil, 1 Quart, 6 Pack
15,441 Reviews
Castrol 06249 Edge 5W-40 Advanced Full Synthetic Motor Oil, 1 Quart, 6 Pack
  • 42 percent better rating on fighting power robbing deposits
  • Superior engine protection versus conventional and synthetic blend oils
  • Superior performance against deposits, wear and oxidation
  • Meets BMW Longlife 01, Mercedes Benz 229.1 and 229.3, Porsche A40, Volkswagen 505.00 and 502.00
  • Exceeds API SL, ACEA A3, ACEA B3, ACEA B4

 

Best Synthetic Oil 5w20

No. 1
Mobil 1 - 112798 120763 Synthetic Motor Oil 5W-20, 5 Quart
16,281 Reviews
Mobil 1 - 112798 120763 Synthetic Motor Oil 5W-20, 5 Quart
  • For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
  • Advanced full synthetic formula; helps prevent deposits and sludge build-up to enable long engine life
  • Excellent overall lubrication and wear protection performance for many driving styles; outstanding thermal and oxidation stability
  • Outstanding performance during the maximum oil change interval recommended in a vehicle's owner's manual; superb viscosity control
  • Enhanced frictional properties; aids fuel economy
SaleNo. 2
Castrol 03063 GTX MAGNATEC 5W-20 Full Synthetic Motor Oil, Green, 5 Quart
18,528 Reviews
Castrol 03063 GTX MAGNATEC 5W-20 Full Synthetic Motor Oil, Green, 5 Quart
  • Dramatically reduce engine wear
  • Leave critical engine parts 4X smoother
  • Add a layer of protection during warm-up and beyond
  • Cling to critical engine parts when the oil drains down
  • API SN; ILSAC GF-5; GM dexos1; Meets Ford WSS-M2C930-A; Meets Ford WSS-M2C945-A; Meets Ford WSS-M2C153-H
SaleNo. 3
Valvoline Advanced Full Synthetic SAE 5W-20 Motor Oil 5 QT
14,929 Reviews
Valvoline Advanced Full Synthetic SAE 5W-20 Motor Oil 5 QT
  • Excellent engine cleanliness through superior sludge and varnish protection
  • Outstanding high-temperature protection under severe driving conditions
  • Superior cold-temperature protection through faster oil flow at start-up
  • Meets the API SN Plus classification protecting engines from LSPI (Low Speed Pre-Ignition)
No. 4
Pennzoil - 550045202 Ultra Platinum Full Synthetic 5W-20 Motor Oil (5-Quart, Single-Pack)
7,282 Reviews
Pennzoil - 550045202 Ultra Platinum Full Synthetic 5W-20 Motor Oil (5-Quart, Single-Pack)
  • Engineered to provide a high-quality base oil using our revolutionary PurePlus gas-to-liquid technology in combination with a high-performance additive system
  • Delivers unsurpassed sludge protection to help keep high performance and luxury car engines as close as possible to factory clean
  • Provides oil stability and endurance under extreme conditions (heat, load and speed) for protection against viscosity loss and thermal breakdown
  • Formulated to deliver faster low temperature oil flow and protection in extreme heat
  • Keeps pistons dramatically cleaner than required by the toughest industry standards
No. 5
AmazonBasics Full Synthetic Motor Oil - 5W-20 - 1 Quart - 6 Pack
24,828 Reviews
AmazonBasics Full Synthetic Motor Oil - 5W-20 - 1 Quart - 6 Pack
  • For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
  • Formulated for longer drain intervals
  • Helps prevent build up that can cause rust and corrosion
  • Reduces friction for less engine wear
  • High resistance to viscosity and thermal breakdown

 

Best Synthetic Oil 10w30

No. 1
Pennzoil Platinum Full Synthetic 10W-30 Motor Oil (5-Quart, Single)
968 Reviews
Pennzoil Platinum Full Synthetic 10W-30 Motor Oil (5-Quart, Single)
  • Full synthetic 10W-30 engine oil made from made from natural gas, not crude, using Pennzoil's patented gas-to-liquid PurePlus Technology
  • Provides better fuel economy—drive on average an extra 550 miles per year (versus a dirty engine)
  • Pennzoil Platinum 10W-30 keeps pistons up to 45% cleaner than the toughest industry standard (Based on Sequence IIIH results)
  • No other leading synthetic oil provides better wear protection from friction (Based on Sequence IVA wear test using SAE 5W-30)
  • Formulated to provide faster low-temperature oil flow and protection in extreme heat
No. 2
Castrol 03081 Edge 10W-30 Advanced Full Synthetic Motor Oil, 5 Quart
2,335 Reviews
Castrol 03081 Edge 10W-30 Advanced Full Synthetic Motor Oil, 5 Quart
  • 42 percent better rating on fighting power robbing deposits
  • Superior engine protection vs conventional and synthetic blend oils
  • Superior performance against deposits, wear and oxidation; Bottle Color: Black
  • Meets GM 4718M and Chrysler MS 6395
  • Exceeds ILSAC GF-5, API SN, ACEA A1/A5, ACEA B1/B5
No. 3
Mobil 1 - 120767-1 Extended Performance 10W-30; 5QT
16,436 Reviews
Mobil 1 - 120767-1 Extended Performance 10W-30; 5QT
  • Mobil 1 Extended Performance full synthetic motor oil 10W-30 helps to protect your engine from the five factors that can damage engines over time
  • Helps to protect critical engine parts for up to 20,000 miles between oil changes*, controlling oxidation to prevent oil breakdown and maintaining excellent viscosity
  • Meets ILSAC GF-6 standards to help provide low-speed pre-ignition (LSPI) and timing chain wear protection while keeping your engine clean and helping to improve your fuel economy
  • Helps extend engine life by working to prevent damaging deposits and sludge buildup
  • Provides excellent internal engine heat protection (up to 500 degrees F) and low temperature protection (to -20 degrees F)

 

Best Synthetic Oil 0w20

SaleNo. 1
Valvoline Advanced Full Synthetic SAE 0W-20 Motor Oil 5 QT
14,863 Reviews
Valvoline Advanced Full Synthetic SAE 0W-20 Motor Oil 5 QT
  • Innovative anti-wear additives provide 50% more wear protection than industry standards as tested in the industry Sequence IVA wear test
  • Full synthetic formula for exceptional high and low temperature protection
  • Extra detergents help fight sludge and deposits
  • Superior antioxidants resist motor oil breakdown in extreme conditions
No. 2
Castrol 03060 GTX MAGNATEC 0W-20 Full Synthetic Motor Oil, Green, 5 Quart
7,896 Reviews
Castrol 03060 GTX MAGNATEC 0W-20 Full Synthetic Motor Oil, Green, 5 Quart
  • For Best Performance, Follow The Manufacturer'S Recommendations In Your Vehicle Owner’S Manual.
  • Dramatically Reduce Engine Wear
  • Leave Critical Engine Parts 4X Smoother. As Tested In The Industry Sequence Iva Wear Test
  • Superior Wear Protection On Critical Engine Parts
SaleNo. 3
Castrol 03124 Edge 0W-20 Advanced Full Synthetic Motor Oil, 5 Quart
7,442 Reviews
Castrol 03124 Edge 0W-20 Advanced Full Synthetic Motor Oil, 5 Quart
  • 42 percent better rating on fighting power robbing deposits
  • Superior engine protection vs conventional and synthetic blend oils
  • Superior performance against deposits, wear and oxidation; Bottle Color: Black
  • Meets the needs of Honda, Toyota, Acura, Lexus and other vehicles where 0W-20 grade is recommended
  • Exceeds ILSAC GF-5, API SN, ACEA A1, ACEA B1
No. 4
Amazon Basics Full Synthetic Motor Oil, SN Plus, 0W-20, 1 Quart, 6 Pack
24,889 Reviews
Amazon Basics Full Synthetic Motor Oil, SN Plus, 0W-20, 1 Quart, 6 Pack
  • For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
  • Formulated for longer drain intervals
  • Helps prevent build up that can cause rust and corrosion
  • Reduces friction for less engine wear
  • High resistance to viscosity and thermal breakdown
No. 5
Pennzoil 550046127 Platinum Full Synthetic Motor Oil (SAE, SN) 0W-20, 5 Quart - Pack of 1
1,833 Reviews
Pennzoil 550046127 Platinum Full Synthetic Motor Oil (SAE, SN) 0W-20, 5 Quart - Pack of 1
  • Full synthetic 0W-20 engine oil made from made from natural gas, not crude, using Pennzoil's patented gas-to-liquid PurePlus Technology
  • Pennzoil 0W-20 is a carbon neutral motor oil, achieved through verified Nature Based Carbon Credits that offset the CO2 lifecycle emissions
  • Provides better fuel economy—drive on average an extra 550 miles per year (versus a dirty engine)
  • Pennzoil Platinum 0W-20 keeps pistons up to 45% cleaner than the toughest industry standard (based on Sequence IIIH results)
  • No other leading synthetic oil provides better wear protection from friction (Based on Sequence IVA wear test using SAE 5W-30)
SaleNo. 6
Royal Purple 51020 API-Licensed SAE 0W-20 High Performance Synthetic Motor Oil, 5 Quart
1,494 Reviews
Royal Purple 51020 API-Licensed SAE 0W-20 High Performance Synthetic Motor Oil, 5 Quart
  • Better wear protection
  • Increased protection against LSPI
  • Increased fuel efficiency
  • Better protection for vehicle exhaust emissions equipment
  • Improved compatibility with fuels containing ethanol
No. 7
Valvoline Full Synthetic High Mileage with MaxLife Technology SAE 0W-20 Motor Oil 5 QT
1,313 Reviews
Valvoline Full Synthetic High Mileage with MaxLife Technology SAE 0W-20 Motor Oil 5 QT
  • Premium, full synthetic base oil for the best protection against engine heat and stress
  • Seal conditioners rejuvenate aging engine seals to help stop and prevent oil leaks
  • Extra wear protection helps prevent future engine wear
  • Extra detergents keep older engines cleaner by bonding with and removing sludge and deposits
No. 8
Mobil 1 0W-20 Advanced Fuel Economy Full Synthetic Motor Oil, 5 qt.
128 Reviews
Mobil 1 0W-20 Advanced Fuel Economy Full Synthetic Motor Oil, 5 qt.
  • Low viscosity, fully synthetic formula
  • Helps to increase engine efficiency and improve fuel economy up to 2%
  • Outstanding thermal and oxidation stability
  • Help to reduce oil aging resulting in long-lasting protection
  • Outstanding low-temperature capabilities
No. 9
Pennzoil - 550045193 Ultra Platinum Full Synthetic 0W-20 Motor Oil (5-Quart, Pack of 1)
7,268 Reviews
Pennzoil - 550045193 Ultra Platinum Full Synthetic 0W-20 Motor Oil (5-Quart, Pack of 1)
  • Full synthetic 0W-20 engine oil made from natural gas, not crude, using Pennzoil's patented gas-to-liquid PurePlus Technology
  • No other leading motor oil provides better wear protection for your engine (based on Sequence IVA wear test using SAE 5W-30)
  • Pennzoil 0W-20 is a carbon neutral motor oil, achieved through verified Nature Based Carbon Credits that offset the CO2 lifecycle emissions
  • Helps protect engines from loss of power and provides better fuel economy—drive on average an extra 550 miles per year (versus a dirty engine)
  • Keeps pistons dramatically cleaner than required by the toughest industry standards (based on ILSAC GF-6 and Sequence IIIH piston deposit test using SAE 5W-30)
No. 10
Idemitsu High Mileage 75,000 Miles 0w20 Full Synthetic Motor Oil 0W-20 GF-6 Oil 5 Quarts (30019983-95300C020)
  • Japanese OEM Fill, API SP (backward compatible with SN Plus), - ILSAC GF-6 (backward compatible with ILSAC GF-5)
  • Unique Japanese OE Technology: Designed specifically for Japanese engines with 75,000 miles or more accrued, it helps deliver maximum horse power and greater mileage
  • Mo Friction Modifiers: Helps compensate for looser internal tolerances between moving parts. Offers superior antioxidation, metal protection and engine cleanliness
  • Special Detergents: Fights carbon and sludge build-up to ensure ultimate engine protection and extended engine life
  • Maximum fuel economy: High quality synthetic base oil with advanced additives reduces friction and improves lubricant flow characteristics to deliver highest levels in fuel economy.
No. 12
Valvoline Extended Protection Full Synthetic Motor Oil SAE 0W-20 5 QT
17 Reviews
Valvoline Extended Protection Full Synthetic Motor Oil SAE 0W-20 5 QT
  • Full synthetic formula that is 10X stronger against oil breakdown vs. industry standards as tested in the Industry Sequence IIIHA test
  • Specially formulated with Dual Defense Additive Technology, combining an innovative additive booster and a fortified detergent system
  • Innovative additive booster provides the ultimate protection against engine wear
  • Fortified detergent system fights sludge and helps keep your engine running like new by providing 25% better deposit protection than industry standards as tested in industry sequence IIIH test
SaleNo. 13
Toyota/ exxon mobil Case of 6 Quarts Full Synthetic TGMO SN 0W-20 Oil
448 Reviews
No. 14
Schaeffer Manufacturing Co. 9005-012 Supreme 9000 Full Synthetic Gasoline Engine Oil 0W-20, 1-Quart Bottle (Pack of 12)
45 Reviews
Schaeffer Manufacturing Co. 9005-012 Supreme 9000 Full Synthetic Gasoline Engine Oil 0W-20, 1-Quart Bottle (Pack of 12)
  • GM dexos-1 compliant
  • Improves engine durability without affecting fuel economy
  • Keeps engines cleaner: minimal sludge, soot and carbon buildup
  • Strong protection against wear, scuffing and abrasion – blended with friction modifiers Micron Moly and Penetro
  • Resists thinning at high temperatures; quickly lubricates in colder temperatures
No. 15
AMSOIL Signature Series 0W-20 Synthetic Motor Oil - Gallon
22 Reviews
AMSOIL Signature Series 0W-20 Synthetic Motor Oil - Gallon
  • Extends Drain Intervals
  • Maximizes Fuel Economy
  • Protects Against Wear
  • Reduces Oil Consumption and Emissions
  • Excels in Extreme Temperatures

 

Best Synthetic Oil 0w30

No. 2
Mobil 1 121218 0W-30 ESP Motor Oil - 1 Quart
100 Reviews
Mobil 1 121218 0W-30 ESP Motor Oil - 1 Quart
  • For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
No. 3
Castrol - 152B99-6PK 06244 Edge A3/B4 0W-30 Advanced Full Synthetic Motor Oil, 1 Quart, 6 Pack
7,468 Reviews
Castrol - 152B99-6PK 06244 Edge A3/B4 0W-30 Advanced Full Synthetic Motor Oil, 1 Quart, 6 Pack
  • 42 percent better rating on fighting power robbing deposits
  • Superior engine protection versus conventional and synthetic blend oils
  • Superior performance against deposits, wear and oxidation
  • Meets BMW Longlife 01, GM-LL-A-025, GM-LL-B-025, Mercedes Benz 229.1, 229.3, 229.5, Volkswagen 505.00, 502.00
  • Exceeds API SL, ACEA A3, ACEA B3, ACEA B4

 

Best Synthetic Oil 0w16

No. 2
Valvoline Advanced Full Synthetic SAE 0W-16 Motor Oil 5 QT, Case of 3
15,013 Reviews
Valvoline Advanced Full Synthetic SAE 0W-16 Motor Oil 5 QT, Case of 3
  • Innovative anti-wear additives provide 50% more wear protection than industry standards as tested in the industry Sequence IVA wear test
  • Full synthetic formula for exceptional high and low temperature protection
  • Extra detergents help fight sludge and deposits
  • Superior antioxidants resist motor oil breakdown in extreme conditions
No. 3
Pennzoil - 550049266-6PK Platinum Full Synthetic Motor Oil 0W-16, 1 Quart - Pack of 6
40 Reviews
Pennzoil - 550049266-6PK Platinum Full Synthetic Motor Oil 0W-16, 1 Quart - Pack of 6
  • Full synthetic 0W-16 engine oil made from made from natural gas, not crude, using Pennzoil's patented gas-to-liquid PurePlus Technology
  • Pennzoil 0W-16 is a carbon neutral motor oil, achieved through verified Nature Based Carbon Credits that offset the CO2 lifecycle emissions
  • Provides better fuel economy, exceeding the industry standards (exceeds Sequence VIF fuel economy test)
  • Pennzoil Platinum 0W-16 keeps pistons up dramatically cleaner than the toughest industry standard (based on Sequence IIIH results)
  • Provides unsurpassed wear protection (compared to industry standard Sequence IVA test)
No. 4
Idemitsu Full Synthetic 0W-16 Engine Oil SP/GF-6B - 5 Quart
181 Reviews
Idemitsu Full Synthetic 0W-16 Engine Oil SP/GF-6B - 5 Quart
  • 5 Quart bottle of fully synthetic 0W-16 engine oil - API SP, ILSAC GF-6B
  • Ultra-low viscosity formulation with robust additive technology, enabling engines to achieve maximum levels of efficiency, torque and horsepower.
  • Maximizes fuel economy by combining synthetic base oils with advanced friction modifying additive technologies
  • Engineered for high piston cleanliness which means less oil burn-off and reduced tail pipe emissions
  • Idemitsu 0W-16 is the perfect solution for hybrid and gasoline vehicles.
No. 5
Liqui Moly 20328 Special Tec AA SAE 0W-16 Motor Oil, 5 Liter
4 Reviews
Liqui Moly 20328 Special Tec AA SAE 0W-16 Motor Oil, 5 Liter
  • Optimum oil pressure under all operating conditions
  • Instant lubrication after cold start
  • Extended service intervals
  • Excellent wear resistance
  • Saves fuel

 

Best Synthetic Oil 0w40

No. 1
Pennzoil Ultra Platinum Full Synthetic 0W-40 Motor Oil (1 Quart, Case of 6) (550040856-6PK)
7,255 Reviews
Pennzoil Ultra Platinum Full Synthetic 0W-40 Motor Oil (1 Quart, Case of 6) (550040856-6PK)
  • Full synthetic 0W-40 engine oil made from natural gas, not crude, using Pennzoil's patented gas-to-liquid PurePlus Technology
  • Feel the difference of next level performance, on or off the track, with Pennzoil Ultra Platinum, motor oil designed to deliver complete engine protection.
  • Pennzoil 0W-40 is a carbon neutral motor oil, achieved through verified Nature Based Carbon Credits that offset the CO2 lifecycle emissions
  • Helps protect engines from loss of power and provides better fuel economy—drive on average an extra 550 miles per year (versus a dirty engine)
  • Pennzoil Ultra Platinum 0W-40 is the only motor oil trusted to be factory fill in every Chrysler SRT8 HEMI engine, and the SRT Viper (Chrysler, HEMI, SRT, and SRT8 are registered trademarks of Chrysler Group LLC)
No. 2
Castrol 03101 EDGE 0W-40 A3/B4 Advanced Full Synthetic Motor Oil, 5 quart, 1 pack
7,482 Reviews
Castrol 03101 EDGE 0W-40 A3/B4 Advanced Full Synthetic Motor Oil, 5 quart, 1 pack
  • 42 percent better rating on fighting power robbing deposits
  • Superior engine protection vs conventional and synthetic blend oils
  • Superior performance against deposits, wear and oxidation; Bottle Color: Black
  • Meets Mercedes Benz 229. 5 and 229. 3, Porsche A40, VW 505. 00 and 502. 00, Ford WSS-M2C937-A, PSA B71 2296
  • API SN/CF, ACEA A3, ACEA B3, ACEA B4, A3/B4 certified
No. 3
Mobil 1 - 153669 Synthetic Motor Oil 0W-40 5 Quart
16,642 Reviews
Mobil 1 - 153669 Synthetic Motor Oil 0W-40 5 Quart
  • Mobil 1 Fs European Car Formula Full Synthetic Motor Oil 0W-40 Helps To Extend Engine Life Even In Severe Conditions
  • Helps To Control Oxidation To Prevent Oil Breakdown And Maintain Excellent Viscosity For Up To 10,000 Miles Between Oil Changes
  • Provides Outstanding Engine Wear Protection And Performance With Uniform Synthetic Oil Molecules For Better Friction Reduction
  • Keeps Your Engine Running Like New By Working To Prevent Damaging Deposits And Sludge Buildup

 

Best Synthetic Oil 10w40

No. 1
Valvoline 4-Stroke Motorcycle Full Synthetic SAE 10W-40 Motor Oil 1 QT
686 Reviews
Valvoline 4-Stroke Motorcycle Full Synthetic SAE 10W-40 Motor Oil 1 QT
  • Full synthetic formula helps maximize power and acceleration
  • Formulated to provide outstanding wet clutch protection for maximum power transfer and smooth shifting
  • Added protection against harmful deposits that can decrease engine performance
  • Excellent wear and corrosion protection to help keep the engine performing its best
No. 2
Mobil 1 - 120771 High Mileage 10W-40; 5QT
16,468 Reviews
Mobil 1 - 120771 High Mileage 10W-40; 5QT
  • Mobil 1 High Mileage full synthetic motor oil 10W-40 is designed for engines with over 75,000 miles to go up to 10,000 miles between oil changes*
  • Helps provide low-speed pre-ignition (LSPI) and timing chain wear protection while keeping your engine clean
  • Provides excellent internal engine heat protection (up to 500 degrees F) and low temperature protection (to -20 degrees F)
  • Helps extend engine life by working to prevent damaging deposits and sludge buildup
  • Helps to protect your engine from the five factors that can damage engines over time
SaleNo. 3
Castrol 06112 POWER 1 4T 10W-40 Synthetic Motorcycle Oil, 1 Quart Bottle, 6 Pack (15D1C9)
1,509 Reviews
Castrol 06112 POWER 1 4T 10W-40 Synthetic Motorcycle Oil, 1 Quart Bottle, 6 Pack (15D1C9)
  • Formulated with Trizone technology to protect all 3 critical zones: engine, clutch and gearbox
  • Race derived technology for maximum engine acceleration
  • Extreme high temperature air-cooled performance and water-cooled engine performance
  • Excellent shear stability to prevent viscosity breakdown
  • Exceeds API SL and JASO MA-2

 

Best Synthetic Oil 15w40

No. 1
Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil (1-Gallon, Case of 3)
828 Reviews
Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil (1-Gallon, Case of 3)
  • Full synthetic 15W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, oil breakdown, and improves low-temperature flow
  • Exceptional wear protection for longer life in a wide range of heavy-duty engine applications — from pickup trucks to tractors to semi rigs
  • Enhanced fuel economy capability of 1.5 percent without compromising engine protection or durability (compared to 15W-40 oils)
  • Multi-functional dispersant additives provide an enhanced level of protection against the effects of soot, dirt, and other contaminants (compared to previous formulation)
  • Increased shear stability for better viscosity control and optimal engine oil pressure
No. 2
Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic Diesel Engine Oil 1 GA, Case of 3
1,162 Reviews
Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic Diesel Engine Oil 1 GA, Case of 3
  • “The Only One“ endorsed and recommended by Cummins
  • Superior synthetic base stocks provide faster, safe starts during freezing weather and enhanced thermal properties for hot weather operations
  • Outstanding oxidation resistance supports long oil life in heavy duty engines
  • Superior wear protection for hardworking heavy-duty trucks and equipment
SaleNo. 3
Valvoline Premium Blue One Solution SAE 15W-40 Diesel Engine Oil 1 GA
209 Reviews
Valvoline Premium Blue One Solution SAE 15W-40 Diesel Engine Oil 1 GA
  • One Solution Technology suitable for a wide range of heavy-duty engines including diesel, gas and natural gas applications
  • “The Only One“ endorsed and recommended by Cummins
  • Outstanding oxidation resistance supports long oil life in heavy duty engines
  • Superior wear protection for hardworking heavy-duty trucks and equipment

 

Are you eager to keep your motor safe and sound for a long period? Do you dream about increasing the automobile’s mileage? Are you tired of the employment of conventional oil for lubrication? It’s not a secret that changing oil is a step forward to prolonging the lifespan of your motor and reaching its best productivity. Hence, it’s crucial to opt for the oil, which will contribute to your motor’s smooth functioning plus brilliant condition.

Seeking a lubricant for your motor, you will come across two possible options: synthetic and conventional. The latter is crude oil or a by-product of crude oil whereas synthetic oil is a chemically modified petroleum product.

Automobile owners tend to give preference to synthetic oil after the car’s run-in period. There are many brands, manufacturing synthetic oils, and the majority of them prove to be pretty reliable. Our guide will assist you in picking up the most appropriate variant for your automobile.

While selecting the oil, give preference to the one recommended by your car manufacturer and which is highly estimated by other drivers. We have held our own research and now, we are ready to share the results with you. Here are 10 best synthetic motor oils.

 

Bestselling Motor Oils on Amazon

 

 Best Motor Oil Brands

 

Castrol 03084C Edge 5W-30 Advanced Full Synthetic Motor Oil

Castrol 03084C Edge 5W-30 Advanced Full Synthetic Motor Oil, 5 Quart
15,403 Reviews
Castrol 03084C Edge 5W-30 Advanced Full Synthetic Motor Oil, 5 Quart
  • Advanced premium full synthetic motor oil to offer strength under extreme pressure
  • Titanium strong for maximum engine performance
  • Reduces metal-to-metal contact across a range of different driving speeds
  • Protects the engine for the entire drain interval even under extreme pressure
  • Decreases engine deposit formation to help maximize engine response

Castrol 03101 EDGE is first-class synthetic oil, contributing to efficient lubrication and smooth operation of every motor’s component.

Lubrication and Protection Qualities  

Undoubtedly, this oil is great at providing each engine’s internal part with perfect lubrication. Thus, you can be calm that there is no metal or just a little part of it on metal contact no matter what speed you are driving at. Additionally, this synthetic oil saves you from the formation of deposits in your motor. Consequently, it helps your motor to function steadily and have a greater lifespan.

Viscosity Features

The viscosity index of this oil equals 0W-40, signifying that it goes well with cold temperatures and in the winter season. If you live in a region with cold winters but aren’t ready to sacrifice the health of your motor, you can surely acquire this oil to avoid the engine’s malfunctions because of low temperatures. Simultaneously, this oil works rather efficiently under high temperatures though its productivity decreases a little in comparison with colder seasons. Thus, if you live in a region with a hot climate, pay attention to some other options.

Composition Particularities

This oil’s excellent quality raises it to the top of the list. Nevertheless, its main distinction from its rivals is its unique fluid titanium technology. Very often, oil’s productivity may fall due to the high pressure produced by contemporary motors. But Castrol is enforced with titanium, assisting the oil to withstand the pressure and keep its lubrication qualities.

Compatibility

As a rule, this oil is compatible with the majority of contemporary motors. Still, owners of European automobiles, including the ones of Volkswagen, Ford, BMW, Porsche and Mercedes Benz, will remain absolutely content with the service this oil provides. Moreover, it can contribute to enhanced fuel efficiency to boot.

 

Mobil 1 Advanced Fuel Economy 120758 Advanced Full Synthetic Motor Oil

Mobil 1 120758 Synthetic Motor Oil 0W-20 Advanced Fuel Economy, 5 Quart
16,316 Reviews
Mobil 1 120758 Synthetic Motor Oil 0W-20 Advanced Fuel Economy, 5 Quart
  • For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
  • Low viscosity, advanced full synthetic formula; helps increase engine efficiency and improve fuel economy up to 2 percent
  • Outstanding thermal and oxidation stability; helps reduce oil aging, resulting in long lasting protection
  • Outstanding low-temperature capabilities; quick cold-weather starting and fast protection helps extend engine life
  • Precisely balanced additive component system

Being first released about a century ago, Mobil 1 oils remain among the most widespread and reliable ones.

Basically, it’s the world’s foremost synthetic motor oil brand, employed by a greater number of automobile manufacturers (comprising Porsche and Mercedes) and NASCAR teams than any of its rivals. You will definitely commit no mistake by choosing motor oil by Mobil 1.

Brand’s extended performance synthetic motor oil was created concretely to prolong oil change intervals, making it possible to change the oil after driving at least 15,000 miles.

Mobil 1 proved the efficiency of its oil by getting HSV Z Series Maloo R8 Ute (the fastest in the world) to driving about 23,000 miles around Australia without an oil change. As a result, the motor turned out to be as clean as it was before the experiment started.

The company reached such astonishing results thanks to integrated SuperSyn technology, keeping oil anti-wear qualities operating at the best level under very low and very high temperatures. It features some other additional features, offering fantastic thermal plus oxidation stability.

So, this item is a perfect option if you seek oil, able to function at a top level no matter what the temperature is. Furthermore, the brand offers many other options, from 0W-20 to 10W-30 and more.

In general, this motor oil provides outstanding longevity and reliability for reasonable money. It will definitely cope with keeping your motor safe and sound.

 

Pennzoil Ultra Platinum Full Synthetic 5W-30 Motor Oil

Pennzoil Ultra Platinum Full Synthetic 5W-30 Motor Oil (1-Quart, Single-Pack) (550040865)
7,285 Reviews
Pennzoil Ultra Platinum Full Synthetic 5W-30 Motor Oil (1-Quart, Single-Pack) (550040865)
  • Engineered to provide a high-quality base oil using our revolutionary PurePlus gas-to-liquid technology in combination with a high performance additive system
  • Delivers unsurpassed sludge protection to help keep high performance and luxury car engines as close as possible to factory clean
  • Provides oil stability and endurance under extreme conditions (heat, load and speed) for protection against viscosity loss and thermal breakdown
  • Formulated to deliver faster low temperature oil flow and protection in extreme heat
  • Keeps pistons dramatically cleaner than required by the toughest industry standards

Being noted for ensuring excellent maintenance plus demonstrating fantastic protective properties, Pennzoil Platinum Oil is known around the world.

Lubrication and Protection Qualities

This oil is famed for ensuring high-grade lubrication and keeping motors clean. Thus, undoubtedly, all your motor’s internal parts will get a decent level of lubrication. While driving, these parts won’t rub one another and will operate faultlessly. Moreover, it saves motors from debris, dirt and minor particles, which can prevent them from normal operation.

Thus, there will be no need to change oil too frequently, making motor maintenance much easier. Moreover, this is good news as you spend a bit more anytime you acquire a bottle of this oil.

Viscosity Features

The SAE weight of this oil equals 5W-40, ensuring that the viscosity index will always be proper no matter how high or low the temperature is. So, if you live in a region, where the weather can be both warm and cold, you can feel safe from oil getting too thick or too fluid. So, every engine’s part will always remain sufficiently coated with oil no matter what ambience is.

Composition Particularities

This oil’s main distinction from its rivals is the addition of cleansing substances. They ensure that your motor will wear out more slowly. Simultaneously, all the admixtures are added in the perfect proportion in order not to prevent the oil from smoothly functioning until the time for its substitution comes.

Compatibility

The brand developed this formula for a long period to ensure that it can go well with various automobiles. It’s also compatible with such automotive brands as Honda, Ford, GM and Chrysler. Nevertheless, the fuel efficiency of these brands’ vehicles won’t enhance if Pennzoil oil is applied.

 

Valvoline SynPower Synthetic Motor Oil

Valvoline SynPower Synthetic Motor Oil, 5W-20, Case of 6 (927-C)
  • Valvoline SynPower Synthetic Motor Oil, 5W-20, Case of 6 (927-C)

Valvoline is another trustworthy manufacturer of motor oils. Its SynPower lineup comprises full synthetic motor oils, providing proper protection at high temperatures plus excellent cleaning properties. So, it will contribute to your automobile’s fuel efficiency even when it gets older.

Actually, this synthetic oil is compatible with almost all passenger automobiles popular in the United States and Canada. It’s reported to serve faultlessly up to 10,000 miles, more than many other oils for sale.

 

Liqui Moly 2041 Premium Synthetic Motor Oil

Liqui Moly 2041 motor oil is very multi-sided and will easily cope with keeping your motor plus its internal parts in outstanding condition.

Lubrication and Protection Qualities

Liqui Moly 2041oil is so skilled in lubricating and protecting a motor that there is no need to depend on maintenance as strongly as you did before. Greasing all the engine’s internal parts, prevents them from rubbing each other. Consequently, it slows down the motor’s weariness. Additionally, it saves the motor from dust, dirt and debris, ensuring its high productivity.

Viscosity Peculiarities

Keeping the SAE weight of 5W-40, this oil flows smoothly and efficiently, lubricating all the components sufficiently no matter what season or weather is. This oil was created to resist both extremely high and extreme cold temperatures. It saves you from worries about the engine’s productivity. However, prior to acquiring this oil, make sure that it’s compatible with your automobile. It goes well with not all brands and models.

Composition Quality

Due to special admixtures, Liqui Moly oil reduces the level of wear and tear of the engine plus its internal parts. All the ingredients of this oil do their best to reach each part of the motor and ensure its steady operation even in long run.

Compatibility

The bad news is that this oil isn’t compatible with many motors. For example, it shows great results while working with gas and diesel motors along with the ones having the latest engineering concepts. BMW, Volkswagen, Porsche plus Mercedes Benz motors will run smoothly with this oil. Moreover, some enhancement in mpg is possible while driving.

 

Royal Purple 51530 High Performance Motor Oil

Sale
Royal Purple 51530 High Performance Motor Oil 5W-30 (5QT)
3,212 Reviews
Royal Purple 51530 High Performance Motor Oil 5W-30 (5QT)
  • Better wear protection
  • Increased protection against LSPI
  • Increased fuel efficiency
  • Better protection for vehicle exhaust emissions equipment
  • Improved compatibility with fuels containing ethanol

Royal Purple has proved to be rather a trustworthy company, providing high-class automobile care. Its line of high-performance synthetic engine oils always gets to the list of top automotive products and is a great option for high-performance automobiles.

It’s a fact that some synthetic oils fail to keep their shape under the pressure of increased engine’s speeds, temperature and load. As a result, the motor’s fuel economy falls and the engine degrades. So, many oil manufacturers try to create a formula able to withstand extreme temperatures and pressure. And Royal Purple seems to find a solution.

Furthermore, this oil is consonant with conventional, blended and other synthetic motor oils. So, you are free to start applying it without getting rid of the existing oil.

Nevertheless, the brand advises to employ it after driving at least 2,000 miles or after the first oil change.

The owners of high-performance automobiles as well as people, residing in regions with harsh weather conditions, will definitely like this oil. Moreover, it will be a good choice if you are eager to lessen the stress your engine is subjected to or if you use your automobile on a daily basis. This Royal Purple oil will cope with all the tasks, keeping your motor clean and looking as if it was absolutely new.

 

Valvoline High Mileage with MaxLife Technology Synthetic Blend Motor Oil

Sale
Valvoline High Mileage with MaxLife Technology SAE 5W-30 Synthetic Blend Motor Oil 5 QT
4,861 Reviews
Valvoline High Mileage with MaxLife Technology SAE 5W-30 Synthetic Blend Motor Oil 5 QT
  • Enhanced anti-wear additives deliver a thick & durable layer of anti-wear film to help prevent auto engine breakdown
  • Added detergents help protect against sludge and deposits
  • Premium seal conditioners help treat and prevent leaks
  • Superior antioxidants resist motor oil breakdown in extreme conditions

Valvoline’s MaxLife Mileage 5W-30 Motor Oil was concretely developed for automobiles with motors, which ran more than 75,000 miles. So, there is no sense in utilizing this oil for brand new vehicles or the ones with mileage less than 50,000 miles.

Some customers state that they receive the wrong product. The MaxLife is reported to have the Dexos seal, but many customers got this oil without it. Clearly, the absence of the Dexos seal doesn’t decrease the efficiency of this oil as this problem is usually a fault of online sellers. So, if you want to get the right item, make orders only at reputable sites.

Both new and old customers of the Valvoline company liked this oil. Note that even if your automobile doesn’t suit the exact SAE of 5W-30, numerous grades do exist.

De facto, the additives deal with 4 basic reasons of motor failure – leakage, deposits, rubbing plus dirt. The manufacturer advises using this oil after your automobile’s mileage exceeds 75,000 miles.

To sum up: if you have an old motor and want to add a boost to it, MaxLife will be the perfect solution.

 

Schaeffer Manufacturing Co. 9000-006S Supreme 9000 Full Synthetic Engine Oil

Schaeffer Manufacturing Co. 9000-006S Supreme 9000 Full Synthetic Engine Oil 5W-40, 1 gallon
112 Reviews
Schaeffer Manufacturing Co. 9000-006S Supreme 9000 Full Synthetic Engine Oil 5W-40, 1 gallon
  • New packaging coming! Red bottles contain the same great product as the black bottles.
  • Improves engine durability without affecting fuel economy.
  • Keeps engines cleaner: minimal sludge, soot and carbon buildup.
  • Friction modified with Micron Moly and Penetro to reduce friction, wear and scuffing.
  • Resists thinning at high temperatures

Schaeffer synthetic motor oil is a product of top-class, able to increase your motor’s lifespan.

Lubrication and Protection Properties

It’s definitely one of the most efficient engine oils, lubricating all internal components of the motor and decreasing friction between them. Consequently, each detail operates efficiently and in harmony with other parts. It leads to improved longevity of each detail and engine in a whole.

Likewise, Schaeffer oil deals with reducing the possibility of any deposits, comprising dirt, carbon build-up plus soot. So, this oil will be ideal if you are seeking for ways to enhance your motor’s durability. The only minus of this oil is that it’s pretty costly.

Viscosity Peculiarities

This oil performs its functions properly no matter what temperatures it’s subjected to. Thus, even if the weather is frosty, this oil will brilliantly cope with proper lubrication of all components, allowing you to drive off shortly after starting your motor. Similarly, under hot temperatures, the oil doesn’t become too fluid and always ensures a sufficient level of protection.

Composition Particularities

Schaeffer’s formula comprises friction-modifying admixtures such as Micron Moly and Penetro. Thus, it brilliantly decreases rubbing between motor’s parts and enhances the motor’s overall productivity.

Compatibility

Its main shortcoming is that this oil is suitable for diesel engines only, so the number of vehicles it works well with will be rather limited.

 

Mobil 1 Advanced Fully Synthetic Motor Oil

Mobil 1 Advanced Fully Synthetic Motor Oil, OW-20, Case of 6 (MOBIL10W20-C)
  • Mobil1 Advanced Fully Synthetic Motor Oil, OW-20, Case of 6 (MOBIL10W20-C)

Mobil 1 synthetic oil is elastic, allowing you to spend less time on oil maintenance comparing to other brands.

Lubrication and Protection Peculiarities

This synthetic oil provides your motor with powerful lubrication, building a protective layer between all the relevant details plus reducing the possibility of friction between them. Consequently, the weariness of your engine will slow down considerably.

However, this oil is noted not only for increasing the engine’s lifespan but also for keeping it clean. So, oil maintenance will be required not very frequently. At the same time, though you save your time, you won’t save your money as this product is pretty pricey.

Viscosity Qualities

Keeping the SAE weight of 0W-20, this oil is ideal for winter or regions with cold weather. It shows amazing results at preserving a low viscosity index under low temperatures. Consequently, this oil will run smoothly and will provide each detail with the necessary coating. Moreover, this Mobil 1 product doesn’t become too liquid in summer or under hot temperatures.

Composition Particularities

This foremost Mobil 1 formula signifies that all admixtures are properly balanced within the oil. Thus, you are free to feel all their advantages, comprising long-lasting oil, which will allow your motor to work steadily pretty long.

Compatibility

This oil is suitable for a vast number of vehicles, comprising Honda, Toyota, Nissan and GM regardless of what motors they keep. However, the improvement in the mpg is possible, but not guaranteed.

 

Idemitsu Full Synthetic Engine Oil

Idemitsu Full Synthetic 0W-20 Engine Oil SN/GF-5 - 5 Quart
461 Reviews
Idemitsu Full Synthetic 0W-20 Engine Oil SN/GF-5 - 5 Quart
  • For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
  • 5 quart container of full synthetic 0W-20 engine oil - API SN, ILSAC GF-5
  • Maximizes fuel economy by combining synthetic base oils with advanced friction modifying additive technologies
  • Provides outstanding protection against engine wear while minimizing formation of deposits, even under extreme conditions
  • Engineered for high piston cleanliness which means less oil burn-off and reduced emissions

Idemitsu synthetic oil provides maximum lubrication plus protection for the engine’s internal components and allows them to operate smoothly.

Lubrication and Protection Features

This oil is a decent choice for drivers, who are eager to provide their motors with maximum protection but aren’t ready to spend much money on that. Though the brand isn’t so popular, it produces oils of good quality. Thus, the oil will perform all the necessary functions properly and ensure the steady work of your motor, contributing to its better longevity as well.

Viscosity Qualities

The Idemitsu oil with the weight of 0W-20 operates faultlessly even in frosty winters. Thanks to such a viscosity rate, it preserves its structure no matter how low the temperature is, providing sufficient greasing for each detail. This oil can be suitable for a warm climate as it doesn’t become too fluid if the temperature rises.

Composition Quality

This product reaches such an excellent level of lubrication thanks to featuring some friction-minimizing additives. Moreover, this formula keeps some admixtures, which assist in reducing deposits in the motor system. Consequently, the motor doesn’t need any special maintenance but will serve longer, showing great productivity.

Compatibility

Being considered to be top-quality and high-productive oil, this product isn’t compatible with all automotive brands. For instance, it may fail to meet the requirements of some luxury brands. However, it’s suitable for the majority of middle-class vehicles. Moreover, in some cases, it may even enhance fuel efficiency.

 

How to Choose The Best Synthetic Motor Oil?

Oil is such a component of your automobile, which can’t be ignored and must be serviced on time in order to provide the vehicle’s steady functioning. Many drivers neglect oil changing, trying to save some money and time. But actually, by neglecting your motor, you gradually increase the expenditures on your vehicle and, consequently, pay much more than you could spend on oil maintenance.

Synthetic oils have proved their efficiency, but some automobiles may need semi-synthetic ones with low ash rates. Some oils are modified specifically for old cars while others are created with great resistance to cold temperatures.

In order to make the process of choosing motor oil a bit easier, we have prepared some tips for you, which will make you aware of what exactly you need.

 

What’s the Difference Between Synthetic and Conventional Oil?

Conventional oil is natural oil on a mineral basis, refined from crude oil. Such oils are pretty affordable but require frequent change. Moreover, they provide the minimum level of protection for the engine’s internal components.

Synthetic oil is a mix of natural and artificial oils or just artificial oil, fabricated at a chemical laboratory. It ensures maximum lubrication for each engine’s part plus is more resistant to high temperatures than its conventional rivals. Though its price is higher, it serves for a longer period and contributes to the longevity of your motor.

Actually, there are fully synthetic and semi-synthetic oils. The latter is a mix of synthetic oil with conventional one while fully synthetic oil is a product of chemical reactions with no natural components.

Viscosity Level

Motor oil’s viscosity signifies the oil’s resistance to flow and shearing. In simple words, imagine water and syrup. Water has a low viscosity level as it’s more liquid whereas syrup keeps a greater viscosity index because it’s thicker.

So, it’s significant to select the oil with the proper viscosity index for your engine. Usually, you can get this information from a manufacturer’s guide. However, you can opt for the oil, taking into account driving conditions, weather and your automobile’s age.

For instance, if you live in a region with a cold climate, you’d better opt for oil with a low viscosity grade. Meanwhile, high viscosity oils are more appropriate for driving in a hot climate or if you deal with racing or hauling heavy cargoes.

You can see the oil’s viscosity index on both the front and back of the bottle. Moreover, the oil specification and some other details can be found on the bottle back.

 

Things You Need to Keep in Mind While Buying High-Quality Synthetic Oil

Contemporary engines produce much more pressure than their predecessors twenty or thirty years ago. They are able to achieve a pressure of 10 tons per square centimetre. Thus, to cope with that pressure and keep your motor’s inner parts free from rubbing, you need to acquire efficient oil.

Additionally, some drivers forget when they change the oil the last time and often neglect maintenance pretty long. If you have no desire to spend extra money on your vehicle’s repairs, caused by poor oil or its improper servicing, always keep an eye on oil.

Nobody wants to change oil too frequently, but sometimes an automobile may require an oil change after a short period of time. Usually, it happens because of too hot or too cold weather as well as bad driving conditions.

Synthetic oil is a great solution if you want to refrain from a frequent oil change. It lasts longer than its conventional rivals, reducing the risk of any malfunctions. Moreover, it’s more efficient in greasing motor details and allowing them to operate smoothly without rubbing one another.

Note that by providing your motor oil with proper maintenance, you can save much money on repairs as we know that a skilled mechanic may take $200 just to diagnose the problem to tell nothing about any serious repairs.

 

Conclusion

We all know that by purchasing a car, we took a great responsibility. Clearly, when you buy a brand new car, you will face fewer problems and malfunctions. But even in this case, it’s important to preserve your motor’s good condition and contribute to its long life.

Actually, it’s easier to prevent any troubles than to solve them. Synthetic oil can be your best assistant in increasing the longevity of your engine. By getting enough lubrication, the motor’s inner parts won’t rub one another and thus, they became less prone to weariness. Consequently, the motor will function more smoothly, showing greater performance.

Last update on 2021-10-26 / Affiliate links / Images from Amazon Product Advertising API

Thomas Buck

Thomas is our expert in the field of motor oils and lubricants. He worked for more than 15 years at the dealer service station and has vast practical experience, so he gladly agreed to be the editor and co-author of our articles about motors and motor oils.

Leave a Reply

Your email address will not be published. Required fields are marked *

Recent Posts