I have my deceased Mom's 2003 Buick Park Ave 3.8 base (not super charged).
It has 98000 mi but I don't know how reg oil was changed.
However I do know that it was always dealer serviced with Ac-Delco 5W30 syn-blend.
All of my int-combustion engines use M1 10w30 full syn.
So is it ok to switch this 16 yr old car w/98k mi to M1 full syn w/o causing other issues?
Opinions welcomed.
It has 98000 mi but I don't know how reg oil was changed.
However I do know that it was always dealer serviced with Ac-Delco 5W30 syn-blend.
All of my int-combustion engines use M1 10w30 full syn.
So is it ok to switch this 16 yr old car w/98k mi to M1 full syn w/o causing other issues?
Opinions welcomed.