It may be a good oil but why is not this certification on the rear of the bottle?
outrun,quote:
Originally posted by outrun:
Excellent Point,
My take is that the Sham-Tec would be sludged and the M1, RL etc engines would be noticeably cleaner....as intended by the GM engineers running M1 endlessly at the 175mph proving ground romps.
Mobil 1 0W-30 meets or exceeds the following industry specifications:quote:
Originally posted by pscholte:
Pat,
I have a bottle of M1 0W30 in my oil cellar; it specifies on the bottle that it meets GM 4718M.