Blackhawk777

Ok, at cold idle, everything is normal, and at cruising when SUPER hot (like 210*) the pressure holds at about 40, give or take a few psi depending on engine speed, but the pressure drops down to about 25 psi. The car is an auto, so I know it'll be a bit lower than you m6 guys, but does that sound normal, wicked heat soak or is something wrong?? I've seen other autos do the same thing, so I'm curious for a couple of people. I think it's heat soak, cause once the engine cools a little with highway driving, the pressure goes back up to about 30 at idle, and the temps here have been 90+ for a week at least.

OUTLAWZ RACING

iTrader: (9)

Pressure sounds fine just remember the pump will show a higher pressure when cold thats when the oil is thickest, and shows more restriction going through the pump thus showing a higher oil pressure. Once warm the flow does not change just the amount of pressure it takes to move it. Now if you go from 40 psi to 5psi once its warm up then u have a problem. I think gm says for every 100 rpm oil should rise 10 psi dont quote me on that tho.

Blackhawk777

Ok cool. Just making sure nothing was hurt. I've done the whole used oil analysis and nothing came back showing any severe wear and tear, just the usual for a 100k+ car.

01ssreda4

iTrader: (96)

7 psi at idle is acceptable per GM and a general rule of thumb is 10 psi for every 1000 rpms....3K rpms means at least 30 psi. 6K rpms-60 psi etc etc.

Blackhawk777

Hmm... it's real close to 60 at 6000. I'd say 55-58ish. so all is in spec. sweeeet

SOMbitch

iTrader: (8)

Yea the guys with the real healthy OP on here **** me off.LOL Mine idles just under 40 when it gets real hot but at 60MPH is only 42-43 on a 77k motor. It will aproach 60 at 6k like yours. On the other hand my 5.3 179 k motor in my truck idles 43-44 and runs 54-55 hot but won't go higher at WOT WEIRD. Don't lose any sleep over it An external oil cooler may help. I am considering one.