Product Details: With Expertise Built In™, the OTR SAE 75W-90 Synthetic Gear Oil is made with a focus on the critical needs of heavy duty truck transmissions and differentials, especially suited for truck transmissions and axles operating in standard drain service or in “out-of-warranty” situations. OTR gear oil lubricants feature a unique blend of extreme pressure additives as well as rust and oxidation inhibitors for superior gear and bearing protection and performance in the most severe operating environments, from sub-arctic to desert conditions. This heavy duty synthetic gear oil outperforms conventional gear lubricants to promote longer gear life and greater equipment operating economy. FleetPride is your First Click in Heavy Duty®.