Oil pressure?
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Posting Guru
Joined: Jul 2003
Posts: 1,268
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From: Eureka, Ca.
Oil pressure?
My new 390 runs 50psi at idle and 75psi around 3000rpm. Is this normal or do I need a lighter oil. I am running 20-50 (That is what my machinist told me to run) now. I have the Milinton high -volume pump. I haven't had it out on the road yet just b roke it in.
Posting Guru
Joined: Jul 2003
Posts: 2,232
Likes: 1
From: Colville, Washington
That is a little high at idle(what rpm does it idle at?) but not excessive IMO anyway. I think 10w-40 would be sufficient, unless your machinist ran higher clearances than .0025 on the main and rod bearings.
