Manual transmissions and differentials lack an oil pump for forced lubricant circulation, making ZERO SP Titanium Gear Oil effective: its viscoelastic ingredients hold a strong film against gravity up to the tops of the gears.

Unlike engines, gears generate friction at point contacts, so strong extreme-pressure resistance is important. Rather than behaving like conventional gear oil, ZERO SP Titanium Gear Oil transfers from gear to gear through their rotation, progressively forming strong oil films throughout the assembly even without an oil pump.

Its film-forming ability maintains a strong film at high temperatures, loads and rotational speeds, preventing direct metal contact and reducing friction. It also helps the gears rotate more consistently around their shafts, with additional reductions in vibration and noise.

Developed for manual transmissions fitted with a mechanical LSD and for rear differentials. Subaru rear differentials have a relatively small oil capacity of approximately 1L, making heat-related performance loss more likely during high-load driving and placing demanding requirements on the oil.

Titanium Gear 180W-140 meets the performance demands of high-load driving and protects components over a long period as a gear oil for hard sporting use.