Engie oil

[TomC750]

Originally Posted by V8 Bob

IMO, you should NOT run a heavier weight oil than your engine really needs, and this requires an accurate oil pressure gauge to know for sure. Both my flatheads, one stock I've owned for 24+ years with no known previous history, and one fresh and highly modified use 10W30, resulting in very good low and high RPM oil pressure. Heavier-than-needed oil viscosity is not only harder on the oil pump and related gearing, but takes longer to circulate to critical areas especially in colder climates.
I would forget about what oil was "listed" 80+ years ago and simply use a quality modern "detergent" oil with the appropriate weight for your engine and usage.

I am running straight 30 weight presently. Although it runs sweet and smooth with zero smoke, I was disappointed when I drained the old oil a good bit of sludge came out. For a supposedly restored car the lack of maintenance was disappointing. I will get a good gauge on it.
Thank You!