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Re: What's the best oil for a old tired engine?
I run only 5w-30 penzoil with ac filters on my 350 ,5.3 and in the 6.0 i just purschased and never a problem
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2011 silverado 2500hd ext. cab 6.0
2007 tahoe lt
2004 harley-davidson superglide
1982 chevrolet c10 stepside 2 wheeldrive..current project
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