| Re: [GMCnet] Re: Oil Pressure Poll [message #366614 is a reply to message #366578] |
Wed, 08 September 2021 21:05   |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
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Billy Massey wrote on Wed, 08 September 2021 08:55Thanks very much for this, Larry. Very interesting and changed my thinking
on oil pressure.
I'll try it. I'm due an oil change on two other of my high
mileage vehicles AND the GMC.
bdub
On Tue, Sep 7, 2021 at 10:26 PM Larry wrote:
> The one thing I have learned is that with today’s oils, thicker is not
> better. IMO, it is best to use as thin of an oil as possible, that gives
> you acceptable hot oil pressure.
> ... snip ...
>
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Keep in mind that if you go from a... say...15w40 to a 5w30 that your oil pressure will likely drop. That is not a bad thing as long as pressure is at the 10 lbs per 1000 rpm. If you are not comfortable with that kind of drop go for the 0w40 or 5w40 as long as it is high on the wear protection list. JWID. Thick oil does not give you protection from wear. JWIT
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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