Red Line's 75W90 Synthetic Gear Oil is their most popular gear oil, and is the preferred product in nearly all car and light truck differentials, both conventional and limited-slip. 75W90 is preferred for most racing applications. It contains friction modifier which is recommended for limited-slip u...

Max-Gear is an ultra-tough automotive gear oil. It's designed to maximize power and provide unsurpassed protection to heavily loaded gears. It makes gears run smoother, quieter, cooler and longer without overhauls. Max-Gear outperforms other gear oils because it combines the highest quality syntheti...

Out performs other gear oils because it combines the highest quality synthetic oils with Royal Purples proprietary Synslide additive technology Gears run smoother, quieter, cooler and longer without overhauls Not for use in wet clutch systems