Quote:
Originally Posted by jeep_junkie
Oh yeah I agree we can use Dexos1 5w-30 for street use, but I prefer the Dexos2 0w-40 stuff in case there is a track day in my near future. I don't relish the prospect of switching to a different oil for the track.
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So if we can find a dexos2 in 5w40 (while at a price per qt lower than apprx $7.xx for M1 ESP) then we should be ok for either track use or street. I know that it calls for 0w40 for either track or street but if the 0w vs 5w is just for better flow while reaching normal operating temps then the 0w part isn't REALLY a needed specification as GM leads us to believe needed at the track. Its really the 40 that they are suggesting is all around for street and track vs say a 5w30 for street only, where the 30 would be too low for track. At least I think all the above is what I've been reading and hearing discussed on this forum.