2026-09-15
Lexus IS 250/350 ATF Change & IS 300h eCVT Fluid Malaysia
The IS 250 and IS 350 use a 6AT gearbox filled with Toyota WS ATF (3.6L capacity). Change every 20,000 km — dark or burnt fluid causes harsh shifting and premature clutch wear. The IS 300h eCVT uses Toyota CVTF WS; change every 20,000 km to maintain smooth power delivery.
IS Transmission Fluid
- IS 250/350: 6-speed auto — Toyota WS ATF, every 20,000 km
- IS 300h: e-CVT — check HV coolant circuit every 100,000 km
- Use only Toyota/Lexus WS or equivalent spec — do not substitute generic ATF