Yep, if I could buy 5w20 in mobil 1 synthetic I would be using it. If your putting some .99 cent oil in the engine then maybe you should worry, but if its a good grade oil then I can't see where theres a problem
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2002 5M GT (99% stock)
1991 5M LX (30% stock)
patiently awaiting my satin silver 07 Mach 1, and don't forget the shaker
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