justin hover

My idle oil pressure is steady at 18/20psi...it was 38psi until I recently replaced the sending unit. If I run 15/30 will that bump pressure a tad....or, what oil would you reccomend fo bump pressure? Just did a cam swap so new pump/everything but still the "low" for my liking pressue.

3gensoffs

i think you need to find the root of the problem. ive seen a few threads on the o ring at the pump tube getting pinched, causing low pressure. finding an oil to raise pressure will just mask the real issue, if you can even find an oil to do that. just my 2 cents

justin hover

All that was just checked and replaced. I just replaced the sending unit, its just not oem/ac delco which I think is causing the problem. My tuner checked it with a true gauge and it reads 5 above my dash gauge, which reads 20...so essentially 25psi at hot idle. He said not to worry, but if I do worry I could add a slightly heavier weight oil to slightly bump pressure. Just wondering if it will or does work.

Grr

iTrader: (2)

1540 rotella t man, only thing I run in my stuff. One of the best oils on the market

justin hover

Cold start ups are ok with this particular thicker oil?

Grr

iTrader: (2)

Sure, i live way the **** up in North Dakota and I have it in my dd. instant oil pressure at -20 degrees. We have it in all our grain trucks and we start them up at 0 or less all winter long

Zmg00camaross

iTrader: (11)

Your oil pressure is fine. But with a cam swap I like to run valvoline vr1 conventional 10w40 the LS like the thicker side of a 30 weight. But I put in the 40 weight just because I race it a lot and change it pretty often.

LS6427

iTrader: (2)

20w50 in any "basic" LSx engine........

.

justin hover

Just used synthetic Valvoline 10/30..wix filter....pressure holds steady again at 34_45...maybe my filter was just shitty clogged?? I'm happy now

dailydriver

You could go over to bobistheoilguy.com to learn ALL you would ever need to know about engine oils.

The thick vs. thin thing is beat to death on there, but at least you will know the advantages and disadvantages of each.

wssix99

iTrader: (5)

The answer is in your owners manual. Unless you have a build that has different requirements from a stock engine, you can move up to a 10W-30 once the temperatures get above freezing. (But we're supposed to go back to 5W-30 for the winter.)

VandykeT/A

How many miles are on it? And I just started running 5w40 Rotella T6. I used to keep around 75 on a cold start with 5w30 and with a touch of throttle It would go to 80. Now It goes straight to 80 and will completely peg with a little touch of throttle. Hot I used to keep around 60 now 65. This is with a ported TSP pump. My Z28 keeps around 28ish hot idle, 126k and a 70k LS6 pump.

flattusmaximus78

iTrader: (1)

If your stock gauge is accurate, that is not good lol.

dailydriver

Stuck/jammed relief spring??

VandykeT/A

I wouldn't think so. It held 60 cold, 45 hot before the new pump. Then went to those pressures. Sending unit has been replaced. Its been that way for a couple years maybe. Never really gave it much thought.