Recent content by jacobl

  1. J

    safe to use 5w20 instead of 10w30

    I've tried shell rotella 15w40 and it ran good but smoked the same. I tried mobil 1 15w50 and hated it, car was sluggish. i want to see what a thinner oil will do. i am also curious about mobil 1 0w30.
  2. J

    safe to use 5w20 instead of 10w30

    Would the thinner oil increase internal wear? it also has great oil pressure. at operating temperature it has 30psi at idle.
  3. J

    safe to use 5w20 instead of 10w30

    Hello everyone, been a member for a little while first time posting. I drive a 1989 chevy camaro with the 305 and i am currently running quaker state horsepower full synthetic 10w30 and change it every 5k miles. The car uses very little oil but it uses some at startup from the valve guides and...
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