What kind of transmission fluid does a Subaru Impreza take?
In short, it depends on the transmission type: Subaru Impreza models with a CVT use Subaru CVT Fluid, while those with a manual transmission typically use GL-4 75W-90 gear oil. The exact specification can vary by model year and market, so always check the owner’s manual or consult a Subaru technician for your specific vehicle.
The question hinges on differences between the Impreza’s available transmissions and the fluids they require. Below is a detailed, year- and type-specific guide to help you identify the correct fluid and how to maintain it properly.
CVT (Lineartronic) transmission fluid
For Impreza models equipped with the continuously variable transmission (CVT), use the dedicated Subaru CVT Fluid. Substituting with standard automatic transmission fluids or other brands can cause shifting issues or damage over time. Always use the CVTF specified for Subaru’s Lineartronic system and avoid mixing fluids.
- Fluid type: Subaru CVT Fluid (CVTF)
- Compatibility note: Do not substitute Dexron, Mercon, or other ATF fluids unless explicitly approved by Subaru for your year/model
- Service guidance: Follow the owner’s manual for service intervals and filling procedures; CVT servicing may involve drain/refill or flushing as recommended
- Availability: Sold through Subaru dealers, official parts channels, and reputable suppliers that certify compatibility with Subaru CVTs
Fluids designated for CVTs are specialized for the belt-and-p pulley design of Lineartronic units. Using the wrong fluid or improper changes can impair performance and may affect warranty coverage. Always verify the exact fluid specification for your year and market with the owner’s manual or a Subaru-certified technician.
Manual transmission fluid
Impreza models with a manual gearbox use a GL-4 75W-90 gear oil. This lubricant protects the synchronizers and gears in the manual transmission, and Subaru typically advises avoiding GL-5 formulations unless a specific model year or market calls for it.
- Fluid type: GL-4 75W-90 gear oil (synthetic or synthetic-blend as long as GL-4 rating is present)
- Compatibility note: Do not use GL-5 fluids in most Subaru manuals unless specified by Subaru for your exact transmission
- Service guidance: Follow the vehicle’s manual for fill capacity and the recommended drain-and-fill or full-port service procedure
- Availability: Available as Subaru-approved manual transmission fluids or reputable aftermarket brands with GL-4 designation
For manual Impreza transmissions, sticking to a GL-4 75W-90 gear oil and following the OEM service intervals helps maintain smooth shifting and gearbox longevity. If you’re unsure about your model-year specifics, consult the manual or a Subaru-trained technician.
Additional notes by model year and market
Transmission specifications can vary across different markets and model years. Some earlier Impreza models or regional versions may have different service intervals or fluid recommendations. Always confirm the exact fluid type, capacity, and replacement interval for your vehicle by consulting the owner’s manual or contacting a Subaru dealer in your region.
Summary
In summary, choose Subaru CVT Fluid for CVT-equipped Impreza models and GL-4 75W-90 gear oil for manual transmissions. Always verify the precise specification and service intervals for your specific model year and market, and rely on official documentation or a Subaru-certified technician to avoid incorrect fluids or procedures.
