Racing oils provide more wear protection than motor oils for passenger vehicles, however, these products contain fewer detergents and are not suitable for street use Details: Sold as 1 Gallon Reformulated for improved frictional properties Special detergents for improved lubricity and less detonation Polyol ester base stocks provide more stability and film strength when exposed to excess fuel dilution Each of these products has no less than 2200ppm of zinc and phosphorus for anti wear Each race oil product is a multi-grade, offering 2-4 percent more power than oil of a similar viscosity 20WT is a 5W20, 30WT is a 10W30, 40WT is a 15W40, 50WT is a 15W50 Improved protection at startup, lower oil temp, cleanliness Remember to change these oils more frequently than regular motor oils Used in applications with wider bearing clearances Popular with sprint and midget applications on methanol offers less frequent oil changes due to less fuel dilution Phosphorus, Avg PPM 2450 Zinc, Avg PPM 2400 SAE Viscosity Grade 15W50 Vis at 100 degrees C, CSt 19.2 Vis at 40 degrees C, CSt 135 Viscosity Index 141 CCS Viscosity, Poise, at degrees C 35 at neg 15 degrees C Pour Point, degrees C neg 45 Pour Point, degrees F neg 49 NOACK Evaporation Loss,1hr at 482 degrees F (250 degrees C), percent 6