10WT RACING OIL 0,946 LTR Used by many NHRA Pro Stock teams for dyno testing. Much longer drain intervals than competing brands at similar viscosity. Also used in Jr. Dragster engines. Popular in IHRA Pro Stock, Top Sportsman (normally aspirated), ADRL Extreme Pro Stock and NHRA Com10WT RACING OIL 0,946 LTR Used by many NHRA Pro Stock teams for dyno testing. Much longer drain intervals than competing brands at similar viscosity. Also used in Jr. Dragster engines. Popular in IHRA Pro Stock, Top Sportsman (normally aspirated), ADRL Extreme Pro Stock and NHRA Competition Eliminator.