2026-10-08 · 5 min read
Subaru WRX STI Transmission Fluid Guide Malaysia
The WRX STI 6-speed manual gearbox system involves four separate fluids: the 6MT gearbox oil, front differential fluid, rear differential fluid, and DCCD centre differential fluid. All four should be serviced every 40,000 km. Use correct gear oil specifications for each location — mixing up DCCD fluid especially can cause handling issues. A Subaru specialist workshop is recommended for full drivetrain fluid service.
WRX STI 6MT Gear Oil
- 6-speed manual: Subaru Genuine MT Fluid or 75W-90 GL-4 — every 30,000 km
- Rear differential: 80W-90 GL-5 — every 30,000 km
- Center diff (DCCD): check annually for leaks