1 - do you have a real oil pressure gauge? what does it read at idle and 3000 rpm?
2 - if an idiot light, is it coming on?
3 - no Fram filters, ever
4 - is the guy who rebuilt it experienced with Buick engines? or is he just some random Chevy guy? Buick's need tight bearing cleareances so if he rebuilds it with the sloppy bearing clearances that a lot of Chevys will take the Buick can't keep pressure up.
5 - Rotella 15w-40 should be fine
The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
Vladimir Lenin
Government schooling is about "the perfect organization of the hive."
H.H. Goddard, Human Efficiency (1920)
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