Lucas Oil L9 7.5 wt High Performance Synthetic Racing Gear Oil is blended with an exclusive additive package containing effective anti-wear agents and extreme friction reducers that are unique to the industry. Provides excellent thermal stability and longevity and is recommended for use in both transmissions and differentials. Lucas Oil L9 7.5 wt High Performance Synthetic Racing Gear Oil is a low viscosity, low drag formula designed for racing applications only. Dyno tested for proven friction reduction and track tested with proven performance in IRL, NASCAR and NHRA.