Posted by Ken See on Thursday, December 05, 2002 at 9:59AM :
In Reply to: Anyone use Mobil 1 10W30 synthetic oil? posted by Tom in Boise on Wednesday, December 04, 2002 at 11:58PM :
A Carquest guy told me not to use Mobil 1 in an engine that had used regular oil for awhile, something about the two types not compatible. Maybe he meant you couldn't mix them. He swears by Castrol Syntec, he races cars and pays attention to oil performance.
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