Does Subaru CVT have transmission fluid?

Yes. Subaru’s continuously variable transmissions (Lineartronic) rely on a dedicated CVT transmission fluid (CVTF). This fluid is different from engine oil or standard automatic transmission fluid, and the correct CVTF specification must be used for your specific model and year.

Understanding the role of CVT fluid in Subaru transmissions

In a CVT, the fluid serves multiple critical functions: lubricating moving parts, cooling the transmission, and acting as the hydraulic medium that transmits force within the belt-and-pulley system. Because CVTs operate differently from conventional automatics, using the right CVTF formulation is essential for smooth operation, longevity, and avoiding unusual wear or shifting issues.

CVTF specifications and compatibility for Subaru models

Subaru uses a dedicated CVTF across its Lineartronic transmissions, but the exact specification can vary by model year and transmission code. The two broad families most often cited in service literature are CVTF Type H and newer formulations that may be specified differently for newer transmissions. Always confirm the exact fluid specification for your vehicle with the owner’s manual or a Subaru dealer, and never substitute with standard ATF or another brand’s CVTF without confirmation.

Before you review the fluid requirements, note that many Subaru models have sealed CVTs with no user-accessible dipstick. In those cases, fluid levels and condition are checked and serviced by a trained technician using the prescribed procedure and equipment.

For a quick guide, keep in mind:

• Use the CVTF specified by Subaru for your vehicle’s year and transmission code. This is typically labeled as Subaru CVTF (often associated with Type H formulations for earlier Lineartronic units).


• Do not use conventional automatic transmission fluid or engine oil in the CVT. Mixing fluids can lead to slipping, poor shifting, or damage.


• Some models with sealed CVTs require service at a dealership or certified shop; don’t attempt a DIY fluid refill unless your manual explicitly allows it.


• If you’re unsure about the correct fluid, contact your dealer or consult the service bulletin for your VIN to confirm the exact CVTF specification.

In short, Subaru CVTs do use transmission fluid, specifically a Subaru-approved CVTF, and using the correct specification is key to reliability and performance.

Maintenance, service intervals, and practical tips

Maintenance practices and service intervals for CVTF can vary by model year and driving conditions. Always follow the schedule in your owner’s manual or your dealership’s guidance. If your vehicle has a dipstick for CVTF, check the level and condition as instructed; if it’s a sealed unit, rely on professional service for level checks and fluid changes.

• Follow the exact CVTF replacement interval recommended for your model and year. Some Subarus require a fluid change at specific mileages or intervals, while others may specify inspection with service instead of routine replacement.


• Look for signs of CVTF deterioration: burnt smell, dark or foamy fluid, slipping, shuddering, or unusual noises during acceleration or gear changes. These warrant a professional inspection and potential fluid replacement.


• When changing CVTF, use the proper procedure and equipment. Many dealers perform drain-and-fill or CVT-specific fluid exchanges to ensure complete air removal and proper filling.


• If your Subaru has a sealed CVT with no dipstick, rely on dealer-maintained service intervals and report any symptoms promptly to avoid potential damage.

Professional service can diagnose issues such as fluid contamination, incorrect fluid type, or seal leaks, which are more likely to cause CVT problems than normal wear alone.

Common questions and practical takeaways

Bottom line: yes, Subaru CVTs have transmission fluid, and using the correct CVTF is essential. If you’re planning maintenance or a fluid change, verify the exact specification for your model year and seek professional service if your vehicle’s system is sealed.

Summary

Subaru’s Lineartronic CVTs rely on dedicated CVTF to operate correctly. Always use the exact CVTF specification prescribed for your model and year, avoid mixing fluids, and follow the service guidance from Subaru or a qualified technician. For sealed CVTs, rely on dealership service for level checks and fluid changes. Proper CVTF maintenance helps preserve smooth shifting and long-term reliability.

How to check Subaru CVT transmission fluid?

To check a Subaru CVT transmission fluid, you must first warm up the transmission by driving the car until it reaches operating temperature and then park on a level surface. Next, with the engine idling, shift through all gears (P, R, N, D) to circulate the fluid and return to Park. Finally, locate the fill plug on the transmission (often on the passenger side), remove it, and add new fluid until it drips out. A scanner or infrared thermometer may be needed to monitor the temperature during this process.
 
This video demonstrates how to check Subaru CVT transmission fluid level: 58sMrSubaru1387YouTube · Apr 17, 2020
Step 1: Warm up and prepare the vehicle 

• Drive the car until it reaches normal operating temperature. Newer models may have a transmission fluid temperature gauge; otherwise, the temperature should be between approximately 95–113°F (35–45°C) for the check to be accurate. 
• Park the vehicle on a level surface. 
• With the engine idling, shift through all gears (P, R, N, D, N, R, P) to circulate the fluid. 

This video explains the process of warming up the Subaru CVT and shifting through gears: 59sThe Master MechanicYouTube · Aug 5, 2024
Step 2: Locate the fill plug 

• Most modern Subaru CVTs do not have a traditional dipstick. 
• Locate the fill plug on the side of the transmission. It is typically an 8mm hex plug on the passenger's side, but this can vary by model. 

This video shows the location of the CVT fill plug and other related components: 48ssubtledriverYouTube · Jul 23, 2019
Step 3: Check the fluid level 

• Remove the fill plug. 
• If the fluid is at the correct level, it will be dripping or just starting to trickle out. 
• If the fluid does not come out, it may be low. Add Subaru-approved CVT fluid slowly until it starts to drip from the fill hole. 
• If you're adding fluid, remember to turn the engine off and then restart it. Cycle through the gears again, and then allow the transmission to reach the target temperature before checking the level again. 

This video demonstrates how to add fluid and check the level: 1mTalking Shop 716YouTube · Aug 28, 2025
Important considerations

• If you are not comfortable performing these steps, it is best to have a professional check the fluid. 
• For specific instructions and torque specifications, consult your owner's manual or a service manual for your exact model.
• Using a scan tool can provide the most accurate temperature reading for your CVT. 

How to refill a Subaru CVT?

– Add new Subaru CVT Fluid (around 3.5 quarts) until it starts to drip from the fill hole. – Let the engine idle until the CVT reaches 95–113°F (35–45°C). – Cycle from Park → Reverse → Neutral → Drive → and back to Park to circulate fluid. – Add fluid until it drips again with the engine running.

What fluid to use in a Subaru CVT?

Always use Subaru-approved CVT fluid or a compatible high-quality alternative like ENEOS ECO CVTF or ENEOS Import CVTF Model S.

Does Subaru CVT transmission fluid need to be changed?

Yes, Subaru CVT fluid needs to be changed, and the recommended interval varies depending on driving conditions. Under severe driving conditions, it is often recommended to change it every 30,000 miles, while under normal conditions, some sources suggest intervals closer to 60,000 miles or even higher, although some owners choose to change it sooner. It is crucial to consult your owner's manual or a Subaru specialty mechanic for the most accurate information for your specific vehicle. 
Service interval recommendations

• Severe conditions: 30,000 miles, especially for drivers who frequently idle in traffic, drive in dusty or extreme temperatures, or tow heavy loads. 
• Normal conditions: Some sources recommend changing the fluid around 60,000 miles, while others suggest it can be done at higher intervals. 
• General advice: The most crucial thing is to follow the maintenance schedule in your vehicle's owner's manual, as it can vary by model and year. 

Why it's important to change the fluid

• Prevents wear and tear: Old, degraded fluid can accelerate wear on the transmission, leading to expensive repairs. 
• Maintains performance: Regular fluid changes help keep the transmission running smoothly. 
• Avoids potential issues: Ignoring the service can cause problems with the transmission, especially if the fluid degrades significantly over time. 

Important considerations for your service

• Use the right fluid: It's important to use the specific type of fluid engineered for Subaru CVTs. 
• Consult a specialist: Since changing CVT fluid can be a complex process that requires a specific fill procedure, many owners choose to have a Subaru dealership or a specialty mechanic perform the service. 
• Drain and fill is common: A "drain and fill" is a common service that removes some, but not all, of the old fluid. This is why some people recommend more frequent changes.