i failed to mention that some racers use dino oils i believe but only if they are a big sponser ,john force castrol for instance.true synthetics will pour at extreme cold temps. and will take the heat where mobile 1 would turn to carbon.dino oil is pushed by our friends the oil companys and we all know they would never lie???to us uh right or maybe or. they are supposed to be our friends.lets see no new refinerys since the 70's during jimmy carters president days.bragging right now about the huge profits they are enjoying.and with this latest storm katrina.we will see gas here in oregon over $4 bucks a gallon.nope i'am sure of it they lie to us.wow what a reality check.hey royal purple works increases gas milege etc. my big chevolds is proof to me and i have been using it for over 2 years,in my trans my rear axle etc.hey if you can buy a better car uh i mean uh.dino oil brain fog.okay send the hate mail my shrink says i can pretty much handle it just don't put that olds in gear by by