Standard oil test Sequence IIIE (part of API category SH): 64 hours @ 140°C on 3.8L Buick V6 loaded to 68 hp @ 3000 rpm. Kinematic viscosity can't rise more than 375% when measured @ 40°C _______________________________________________________ Send a cool gift with your E-Card http://www.bluemountain.com/giftcenter/