If it leaks, doesnt matter what type of oil. Its still gon'a leak.
I'll agree to that. I don't see how oil pressure has any effect on crankcase pressure.
Yes, I read that over at PY too and the explanation made sense. The oil pump pressurizes the oil passages, NOT the internal atmosphere of the block. Excessive blow-by from new rings in a tightly rebuilt block pressurizes the crankcase until they seat. Some builders on the PY threads said that could be as much as 1000 miles.
And then I remembered my previous '80 Turbo T/A where the factory requirements for oil had to be strictly adhered to to avoid problems.
The Pontiac oil mandate for the 301 Turbo Motor?
Straight 30 weight all year long in temperate areas.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
