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I didn't think the M1 5w30 meets the GM???25 spec . I thought M1 0w40
was the only one that meets spec for our Saabs.
What full synthetic 10w30 was the dealer using..M1? Not sure why it
smoked .. The M1 5w30 is not a bad choice..I could think of many worst
oils.
posted by 68.197.43...
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