For a 2012 Acura TSX, the correct transmission fluid depends on the gearbox. The automatic transmission requires Honda/Acura ATF DW-1, while the 6-speed manual requires Honda Manual Transmission Fluid (MTF) or a GL-4-rated gear oil as specified in the owner's manual.
The TSX was offered with two transmissions: a 5-speed automatic and a 6-speed manual. Using the wrong fluid can cause shifting issues and long-term damage. Always verify your exact transmission type by checking the build sheet, VIN, or owner’s manual before purchasing fluid.
Automatic transmission (5-speed)
Use an ATF that meets the DW-1 specification. The following options are commonly recommended by Acura/Honda and aftermarket suppliers when they carry the DW-1 spec:
- Honda/Acura Genuine ATF DW-1 (Acura DW-1, Honda DW-1)
- Any aftermarket ATF that explicitly meets DW-1 specifications from a reputable brand
Note: Dexron VI or other Dexron variants are not approved for DW-1 transmissions and should be avoided unless the manufacturer explicitly states compatibility. Always confirm with your owner’s manual.
Manual transmission (6-speed)
For the 6-speed manual, use Honda MTF (Manual Transmission Fluid) that meets Honda’s specification for the TSX, or a GL-4-grade gear oil as indicated in the owner's manual. If MTF is unavailable, some owners opt for a high-quality 75W-90 GL-4 gear oil, but you should verify compatibility before use.
- Honda MTF (meets Honda specification for the TSX manual transmission)
- GL-4 gear oil (e.g., 75W-90), if compatible per manual
Important: The manual transmission fluid requirements can vary by production date and market. Always consult the owner’s manual or a dealership to ensure the correct grade and specification for your exact vehicle.
Summary
Bottom line: identify your transmission type, then use the manufacturer-approved fluid. Automatic transmissions use DW-1 ATF; manual transmissions use MTF or GL-4 gear oil as specified. Avoid cross-spec fluids and consult the owner's manual for the precise spec and change intervals. When in doubt, contact a dealer or qualified mechanic.