Ferocity02

iTrader: (60)

My oil pressure is pretty good, 50-55 at warm idle, 60 at cruise, 80 at redline. I am using M1 10W-30. My valvetrain is pretty noisy with the new mild cam, dual springs, and proper length pushrods. Would it be a bad idea to switch to a 5W-40 to help quiet down the valvetrain? This would probably increase my oil pressure even more and was worried about excessive oil pressure. The motor has about 105k miles on it, stock bottom end. I will also be going to an oil-cooled turbo in a few weeks and figure a thicker oil may be desirable.

Thanks!

vettenuts

iTrader: (4)

Mobil-1 is at the low end of the 30W range. Why not look at an oil at the upper end of the range such as German Castrol 0W30. There are others as well that provide more viscosity at temperature without jumping to a 40W oil.

Ferocity02

iTrader: (60)

Bump!

M1SERY

know bout that dreaded value train noise, dont know but my noise was getting increasingly worse was going to remeasure my push rods , but put a smoke machine up exhust and found a small exhust leak where the header and the head meet,put a set of $14 gaskets on it and the noise went away, i was for sure that it was valve train noise and so did everyone else . Just $14 man give it a try, Is that factory oil psi mine is that high also, was think it was to high 57 idle 90 wot, i know my ls1 oil pump was swap out thought they might have shimed out the pressure regulator spring and im running 10/30 valvoine full synthentic thinking of droping to 5/30 mobil 1, such i not ????????

Ferocity02

iTrader: (60)

I've spent at least 20 mins feeling around for exhaust leaks and found nada. The heads are new, exhaust manifold flanges were sanded smooth, new GM gaskets, retorqued the bolts yesterday to 18 ft-lbs. I wish I had a smoke machine, that would be sweet. I got thicker oil to try, gonna change it tomorrow.

Ferocity02

iTrader: (60)

Put in Rotella 5W-40. Cruise pressure at 1700 RPM is negligibly higher, maybe 1-2 psi. Valvetrain didn't get any quieter. Oh well.

ZeeOSix

If the oil pump's pressure regulator is working well, then the pressure will never go much above the regulator's setting. You may already be seeing the max pressure at 80 psi at redline due to the pump's pressure regulator valve kicking in.

Keep in mind that there is less oil volume going into the engine at a regulated 80 psi when the oil is thicker vs. when thinner.