Manual transmissions and differentials do not structurally include an oil pump for forced lubricant circulation, so ZERO SP Titanium Gear Oil, with viscoelastic ingredients that maintain a strong oil film against gravity up to the tops of the gears, works effectively.

Unlike engines, gears experience friction at point contacts, making strong extreme-pressure resistance important. Unlike conventional gear lubricants, ZERO SP Titanium Gear Oil moves from gear to gear as they rotate, forming successive oil films and providing a strong film at each component even without an oil pump.

Its strong film-forming ability maintains a robust oil film at high temperatures, loads and speeds, preventing solid metal-to-metal contact and reducing friction. It also helps each gear rotate more consistently around its shaft, producing additional reductions in vibration and noise.

Developed specifically for Subaru manual transmissions to provide smooth shifting throughout the year. It is appreciated for noticeable improvements in feel, including gear and synchronizer protection and improved shift feel. It can be used in the differentials of Subaru vehicles as well as their manual transmissions.