Quote:
Originally Posted by 77 Canamman
1970-1979 350-455 engines all used 6437605 oil filter housing. None other was listed.
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Thanks, that solves that question.
As far as I know, all Pontiac V8 motors from the late 60s thru the late 70s were intended to use 6 quarts of oil. I just checked the owners manual for my 1973 Formula and my 1975 Formula, and the capacities section states 6 quarts of oil when the filter is replaced.
I also have experienced fluctuating oil pressure at internet speeds on cars with 3.42 and 3.55 rear ends. Any time I was taking a car on the interstate, I would check the oil level, top it off, and if I were going on a long trip, I would add an extra quart.
I don't think you need anything greater than 60 psi oil pressure on the street.