Nulon Semi-Synthetic 75W-80 Smooth-Shift Manual Gearbox abd Transaxle Oil is an extreme pressure API GL-4 premium semi-synthetic gear oil that provides smoother shifting in cold temperatures helps reduce gearbox noise and control idle rattle at higher operating temperatures. This fluid is recommended for modern vehicles requiring manual transmission fluid or where automatic transmission fluid is recommended in a manual gearbox. It is also a performance upgrade where a monograde SAE 80 is recommended. Suits Honda, Mazda, Nissan, Suzuki and other manufacturers where GL-4 specification is required.