Per Quart. Viscosity typical of SAE 15W-50. Product Features: A petroleum version of Joe Gibb's original formula race oil, it offers lower cost protection for racers that want to change their oil after every race. Designed for short duration racing where loads are high and air born contaminates require frequent oil changes. It utilizes additives and emulsifiers to fight engine wear and trap dirt particles. Compatible with methanol and high octane race fuels. This oil is made for dirt racers. A mineral 15W-50 loaded with Zinc, XP4 offers low cost protection for dirt racers that change their oil every race. XP4 also provides proven protection for nitrous engines. It is suitable for short duration races. XP4 performs the best in engines operating with oil temperatures between 200F and 240F. JG-XP4 Prices Subject to Change Copyright 2008 by Jet Racing Inc. Created by Jet Racing Inc. to better serve our customers.