Mazda CX-30 Transmission Fluid Capacity

The Mazda CX-30 debuted in 2019 and quickly made a significant impact on the competitive compact SUV market. As part of Mazda’s CX lineup, it serves as a bridge between the smaller CX-3 and the larger CX-5, offering a perfect blend of maneuverability, spaciousness, and cutting-edge technology.

Key Takeaways:

  • Transmission fluid is critical for the smooth operation of your Mazda CX-30’s transmission, affecting everything from gear shifting to the overall lifespan of the unit.
  • For 1st Gen (DM) Mazda CX-30, Mazda recommends using their own ATF FZ for automatic transmissions and a Long Life Gear Oil G7 or GL-4 75W-80 gear oil for manual transmissions.
  • Automatic transmissions in the Mazda CX-30 generally require around 8 to 8.5 quarts for a complete fluid replacement. For manual transmissions, you’ll need around 1.8 quarts.
  • Mazda generally recommends a transmission fluid change every 30,000 to 45,000 miles, depending on driving conditions. Be alert for signs like slipping gears, hard shifts, unusual noises, and discolored or burnt-smelling fluid as indicators that a change is needed sooner.
2022 Mazda CX-30

With its attractive design, high-quality interior, and excellent driving dynamics, the CX-30 has gained a dedicated following. The model entered the market for the 2020 model year and is still in its first generation (DM) as of 2023.

Your Mazda CX-30’s performance is heavily reliant on its transmission, a complex system with many moving parts that need proper lubrication and cooling. That’s where the transmission fluid comes in—it plays a vital role in ensuring your SUV runs smoothly, shifts gears correctly, and doesn’t overheat.

Knowing the right type and capacity of transmission fluid for your CX-30 is crucial for its long-term health and safety on the road.

Understanding the nuances of transmission fluid—like when to replace it, how to check its levels, and what type of fluid to use—can save you from unexpected breakdowns and costly repairs. It can also maximize the lifespan and efficiency of your vehicle.

What is Transmission Fluid?

Transmission fluid is a specialized liquid engineered to meet the lubrication, cooling, and hydraulic needs of a vehicle’s transmission system.

For your Mazda CX-30, the transmission fluid serves several crucial functions that are indispensable for the vehicle’s overall performance and longevity.

The Roles of Transmission Fluid

  1. Lubrication: The fluid acts as a lubricant for the moving parts within the transmission. Without it, components would wear out much more quickly due to friction and heat.
  2. Cooling: Transmissions generate a considerable amount of heat during operation. The fluid helps to absorb this heat and transport it away from vital components, thereby preventing overheating and potential damage.
  3. Hydraulic Function: In automatic transmissions like those often found in the Mazda CX-30, the fluid also serves as a hydraulic fluid that helps facilitate gear shifts.
  4. Clutch Engagement: In manual transmissions, the fluid helps with the engagement and disengagement of the clutch, allowing for smooth gear transitions.
  5. Corrosion Protection: The fluid contains additives that help protect metal components from corrosion and rust.

Why It’s Essential for Your Mazda CX-30

Understanding the importance of transmission fluid in your Mazda CX-30 is not just a matter of automotive knowledge; it’s a critical aspect of vehicle maintenance.

The right type and level of transmission fluid ensure that your SUV performs at its best. It affects your vehicle’s acceleration, fuel efficiency, and overall drive quality.

Failure to maintain the proper type and level of transmission fluid could lead to issues such as erratic shifting, overheating, and even complete transmission failure, which can be both dangerous and costly to repair.

Types of Transmission Fluids

When it comes to transmission fluids, it’s crucial to use the type that is explicitly recommended for your vehicle. The wrong type of fluid can cause adverse effects, ranging from poor performance to severe transmission damage.

Here is a rundown of the general types of transmission fluids and the specific ones compatible with the 1st Gen (DM) Mazda CX-30, which spans from 2020 to the present.

General Types of Transmission Fluids

  1. Dexron/Mercon: These are the most common types of transmission fluids and are usually specified for GM and Ford vehicles.
  2. Type F: Generally used for older Ford vehicles.
  3. HFM Fluids (Highly Friction Modified): These fluids include additives that change their frictional properties and are used in specific vehicles.
  4. Synthetic Fluids: These offer better performance and longevity but are also more expensive.
  5. CVT Fluid: Specifically designed for continuously variable transmissions, not applicable for most traditional automatic or manual transmissions.
  6. ATF+4: Mostly used for Chrysler, Dodge, and Jeep vehicles.

Mazda CX-30 Compatibility

For the 1st Gen (DM) Mazda CX-30 (2020 – Now), Mazda recommends using their specially designed transmission fluids. Always check your owner’s manual, but generally speaking:

  • Automatic Transmissions: The Mazda CX-30 usually requires a specific type of Mazda’s own ATF (Automatic Transmission Fluid), such as the Mazda Genuine ATF FZ.
  • Manual Transmissions: If your Mazda CX-30 comes with a manual transmission, a different type of fluid will be required, typically a Mazda Long Life Gear Oil G7 gear oil, as specified in the owner’s manual. If Mazda Long Life Gear Oil G7 cannot be obtained, use standard oil (API Service GL-4 (SAE 75W-80)).

Why It Matters

Using the right type of transmission fluid is not just a suggestion; it’s a requirement for optimal function and longevity of your vehicle’s transmission. Deviating from the manufacturer’s recommendation can result in poor gear shifting, increased wear and tear, and even catastrophic transmission failure.

Therefore, always refer to your Mazda CX-30 owner’s manual to confirm the appropriate transmission fluid type for your vehicle.

2020-Now Mazda CX-30 Transmission Fluid Capacity

Knowing the correct transmission fluid capacity for your vehicle is essential for proper maintenance. Overfilling or underfilling can lead to problems like erratic shifting, overheating, or even transmission failure.

Mazda CX 30 transmission fluid capacities

For the 6-speed automatic transmissions in the 2.5T Mazda CX-30, the total transmission fluid capacity is generally around 8.5 quarts (8 liters) for a complete fluid replacement, which includes the fluid in the torque converter.

GearboxFluid capacityFluid type
Manual1.70 L (1.80 US qt, 1.50 Imp qt)Mazda Long Life Gear Oil G7
2.0 automatic7.6 L (8.0 US qt, 6.7 Imp qt)Mazda Genuine ATF FZ
2.5T automatic8.0 L (8.5 US qt, 7.0 Imp qt)Mazda Genuine ATF FZ
2.5 automatic
With Cylinder Deactivation
7.9 L (8.3 US qt, 7.0 Imp qt)Mazda Genuine ATF FZ
2.5 automatic
Without Cylinder Deactivation
7.6 L (8.0 US qt, 6.7 Imp qt)Mazda Genuine ATF FZ

However, if you’re doing a simple drain and fill at home, you might be replacing only about 3.7 to 5.1 quarts (3.5 to 4.9 liters), as some fluid will remain in the transmission system.

Things to Consider

  1. Check the Owner’s Manual: Always refer to your specific vehicle’s owner’s manual for the most accurate and personalized information.
  2. Use a Reliable Source: If you don’t have access to your owner’s manual, consult a reliable source like a certified Mazda service center to get accurate information tailored to your specific model and year.
  3. Tolerance Levels: Transmission fluid capacities are often given with a small range of tolerance. This is normal and allows for slight variations in production.
  4. Drain and Fill vs. Complete Flush: The amount of fluid you’ll need will depend on whether you’re doing a simple drain and fill or a complete system flush. A drain and fill will replace less fluid compared to a complete flush that also replaces the fluid in the torque converter.

By knowing the exact transmission fluid capacity of your 1st Gen (DM) Mazda CX-30, you can ensure that you’re providing the best possible care for your vehicle’s transmission, which in turn contributes to the overall performance and longevity of your SUV.

When to Replace Transmission Fluid

Knowing when to replace the transmission fluid in your Mazda CX-30 can make a substantial difference in its performance, longevity, and overall value. This task is often overlooked, but timely fluid changes can save you from costly repairs and unwanted downtime.

2021 Mazda CX-30

Mileage Intervals

Mazda generally recommends changing the transmission fluid at intervals between 30,000 and 45,000 miles, depending on driving conditions and type of usage.

  1. Normal Driving Conditions: If you generally drive under normal conditions—meaning no heavy towing, extended idling, or extreme temperatures—you can likely wait until closer to the 60,000-mile mark.
  2. Severe Driving Conditions: If your driving conditions include frequent stop-and-go traffic, extreme heat, or if you often haul heavy loads, you may need to change the fluid as often as every 30,000 miles.

Signs that Transmission Fluid Needs Changing

While mileage is a useful general guideline, you should also be aware of certain signs and symptoms that indicate a need for fluid replacement:

  1. Slipping Gears: This is often one of the first signs that your transmission fluid is old or low.
  2. Delayed or Hard Shifts: If your CX-30 hesitates or has trouble shifting, this could mean that your transmission fluid needs attention.
  3. Unusual Noises: Hearing whining or clunking noises when your vehicle is in gear could be a symptom of low or degraded fluid.
  4. Dashboard Warning Lights: Modern cars, like the CX-30, have sensors that alert you when something is off with your transmission. Pay attention to any dashboard lights.
  5. Odor or Discoloration: Burnt-smelling, discolored transmission fluid is a sign of overheating and degradation, indicating that a fluid change is necessary.

Cost of Changing Transmission Fluid in a Mazda CX-30

The cost of changing the transmission fluid in a Mazda CX-30 can vary based on several factors such as location, whether you’re going to a dealership or an independent mechanic, and the type of transmission fluid being used. Here’s a general breakdown of what you can expect:

Dealership vs. Independent Mechanic

  • Dealership: Going to a dealership is often more expensive, ranging from $150 to $250 for an automatic transmission fluid change. The upside is that dealerships use OEM (Original Equipment Manufacturer) parts and are specialists in their brand.
  • Independent Mechanic: An independent shop might charge you anywhere from $100 to $200, depending on their rate and the cost of the fluid. Always make sure that they use the correct type of fluid specified for your Mazda CX-30.

Type of Transmission Fluid

  • The type of transmission fluid used can also affect the cost. Synthetic fluids, for instance, may offer better performance and longevity but can cost more than conventional fluids.

Labor Costs

  • Labor costs can vary widely but typically make up a large portion of the total bill. In general, you can expect to pay anywhere from $50 to $100 in labor for a transmission fluid change.

Additional Services

  • Some shops offer transmission flushes instead of a simple drain and fill. A flush can be more effective at removing old fluid but is also more expensive, sometimes doubling the cost. Note that not all manufacturers recommend transmission flushes, so check your owner’s manual and consult with your mechanic.

Geographical Location

  • The cost of living in your area can significantly influence labor costs. Rates are generally higher in urban areas compared to rural locations.

In summary, the cost for a transmission fluid change in a Mazda CX-30 can range from $100 to $250 or more, depending on various factors. It’s a good idea to shop around and get quotes from different service providers, and always make sure that the correct type and amount of transmission fluid is used to comply with Mazda’s guidelines.


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