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big job · 06-18-2021, 05:29 AM

I agree with Tubman. I have no clue who started the myth of that kind of oil pressure
causes damage, seems to be a modern myth. When flatheads of all makes ruled the
road that 60# pressure said I'm healthy. Going to overheads back in my bus days all
V6 GMC's ran at 60# all day. A typical Detroit also runs at 60# at speed and about 10# at idle. The I HAVE in ink the straight 8 Buick Bus engine 60# at cruse 35 to 40# idle ::: when at cruse if its a weak 35# and say 10# idle >its time for rebuild,
thats right in the book. So my 59AB used every day; hot 60# all day and 40# idle.
I now have 9500 or so on this stock rebuild which was born on 20-50 racing oil with
zinc and all this is with the original oil pump. Shame on me, yesterday oil and grease its been a year but didn't use a drop of oil all year and no oil leaks anywhere.
Remember cam bearings will effect pressure.......sam

06-18-2021, 05:29 AM	#13
big job Senior Member Join Date: Sep 2013 Location: Dighton, Mass Posts: 1,230	Re: Viscosity VS Pressure I agree with Tubman. I have no clue who started the myth of that kind of oil pressure causes damage, seems to be a modern myth. When flatheads of all makes ruled the road that 60# pressure said I'm healthy. Going to overheads back in my bus days all V6 GMC's ran at 60# all day. A typical Detroit also runs at 60# at speed and about 10# at idle. The I HAVE in ink the straight 8 Buick Bus engine 60# at cruse 35 to 40# idle ::: when at cruse if its a weak 35# and say 10# idle >its time for rebuild, thats right in the book. So my 59AB used every day; hot 60# all day and 40# idle. I now have 9500 or so on this stock rebuild which was born on 20-50 racing oil with zinc and all this is with the original oil pump. Shame on me, yesterday oil and grease its been a year but didn't use a drop of oil all year and no oil leaks anywhere. Remember cam bearings will effect pressure.......sam