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Old 07-21-2019, 01:43 PM   #31
supereal
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Join Date: Jul 2014
Location: Iowa
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Default Re: Mixing synthetic and regular oil

Synthetic oil is light years ahead of conventional oil, but beware that one of the qualities of full synthetic is its ability to flow.When we rebuild an engine we advise the owner to avoid full synthetic on early engines as it can, and does, leak around the crank seals
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