Re: Here, Take a Poke at Me

Posted by Andy Martin on October 13, 2004 at 12:28:11 from (64.219.39.195):

In Reply to: Here, Take a Poke at Me posted by Allan in NE on October 13, 2004 at 04:55:36:

Not poking at you, but hot 30w oil is much thinner than hot 50w. Not enough to tell by watching it drain, but with scientific measuring tools you can see it.

I run M's on my farm. When I switched to 20w50 from straight 30w I saw very little pressure change in the good engines. Those like a '39 I have which is well worn and used lots of oil showed and increase of maybe 10 psi when it was hot. When it was cold, the oil acts like 20w so oil pressure was still at the relief pressure on the pump. The 20w50 significantly cut oil consumption.

I agree it is no substitute for an overhaul but I don't have the time or money to fix what ain't broke and if a band-aid holds it, I'm happy. I use Barr's Leaks in radiators that leak for the same reason.

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