Bill,Looks like I'll need to add oil after 3,500 miles. With the new GM standard, can I just use Mobile 1 5w30?? I know it meets the standard, but I don't want to mess with my warranty, especially with the turbo.
Are the two Regals you are referring, turbos? If so, I can understand why the warranty on each engine would be voided.def call your dealership. we voided out two new regal warrantys the other day because the owners refused to pay for synthetic. they signed the waiver and now have no engine warranty coverage.