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 Quart Reformulated for improved frictional properties Special detergents for improved lubricity and less detonation Polyolester base stocks provide more stability and film strength when exposed to excess fuel dilution Each of these products has no less than 2200 ppm 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 by many NHRA Pro Stock teams for dyno testing Popular in IHRA Pro Stock, Top Sportsman (normally aspirated), ADRL Extreme Pro Stock and NHRA Competition Eliminator Phosphorus, Avg PPM 2450 Zinc, Avg PPM 2600 Vis at 100 degrees C, CSt 5.8 Vis at 40 degrees C, CSt 29.9 Viscosity Index 138 CCS Viscosity, Poise, at degrees C 30 at neg 30 degrees C Pour Point, degrees C; neg 54 Pour Point, degrees F; neg 65 NOACK Evaporation Loss,1hr at 482 degrees F (250 degrees C), percent 9