Thread: Synthetic Oil?
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Old 04-14-2021, 08:13 PM   #33
Jack E/NJ
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Default Re: Synthetic Oil?

It's still rated a 20W oil hot. So 20psi at a fast idle doesn't seem too unusual. What I find amazing is almost no pressure dependence on temperature. My 64 & 05 vehicles show same behavior. Probably means viscosity doesn't change much with temperature and thus flows nearly as well on a cold startup as it does after it's warmed up. As Martha Stewart might say, that seems like a good thing. 8^) Jack E/NJ
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