Are you skeptical that synthetic oil actually keeps your engines clean like they advertise? This engine has 130K miles and has run full synthetic oil since the first 500 miles, you be the judge.



This wouldn't be a blown 5.3 with dead fWONkin hole...would it?
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Why Yes, it would be.This wouldn't be a blown 5.3 with dead fWONkin hole...would it?
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Maybe if I ran Amsoil Gasoline, the valve wouldn't have burnt.
Naw, it's that big right foot in the drivers seat.