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396 experts need help
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07-25-2020, 01:29 PM
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gmc684x4
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Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
Re: 396 experts need help
Why such a thick oil ?
Most guys i know run 10/40 or even 5/30
20/50 is a diesel truck oil
Do you have headers?
Are they loose
Have you used comp cam lifters i have heard there fairly noisy
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