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Engine at normal temperature At 750 rpm, what should oil pressure read at the minimum? Thanks
10 psi minimum, but most have a least 25 to as much as 60 stock. My 73 W200 360 stock has 45 hot idle.
Is it and old engine or rebuilt? What oil are you running? HV oil pump or a stocker? There are many variables , what is your hot oil pressure at idle?
AND WHAT are you using for a gauge?
10w30 oil, 20 psi hot idle 650 rpm in drive stopped at traffic light. 60 psi driving, high performance engine was built about 7 seven years ago, in the car when I purchased it five years ago, not many miles on it. Auto Gauge direct reading gauge. Thanks to all
that is normal, no worries
650 is low idle, that's half of why its 20. 750 would make it closer to 30, change to 30 or 20/50 and it would be mid high 30s. Reasons for variances.. bearing clearance/applies to failure or or general running clearance, engine oil temp, leakage, OIL WEIGHT. 30 is what I recommend for nice weather. Extreme ends hot/ cold, 20/50
Thanks, I was thinking about both oils..
Tried the 20W50 oil.
So what did you see? About 10 psi increase in hot idle or ?
I am going to drive it again, I think the idle psi was higher than that, going down the road it just about equal to the 10W30. Thanks
Makes one feel a lot better. Glad to help.
Took it out, 30 to 34 psi at idle. Thanks
20 PSI at 650 hot with 10w30. I'd say you're good to go.
I’m about 25 hot idle, about 900-1000 rpm idle. I do a bunch of idling through the pits so I have a higher idle for more splash oiling for the cam, 20w50 Brad Penn grade 1, and shift at 6700 rpm. Have had no issues.
I idle at 850-900 and about 40 psi with 10-30 valvoline VR1 synthetic , i would not worry with 20 at 650 as long as it goes upwith the RPMS
20 psi. at 700pm idle 15W40.
I have 20W50 in it now, will see how that goes. Thanks for all the input.