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Old 05-23-2021, 02:57 PM   #12
nighttowl
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Drives: 2018 ZL1 1LE
Join Date: Dec 2011
Location: TX
Posts: 1,907
Quote:
Originally Posted by Scottyz View Post
Ok so first off please don’t think I’m trying to argue or make excuses for GM because I’m not. I hope you don’t have an issue with your pump that’s for sure.
Understandable, but a car doesnt lose 30% of its hot idle oil pressure in 200 miles if nothing is wrong.

I changed the oiil to 15w50, did a HPDE and the idle pressure went down. I changed the oil back to 5w-30, and the pressure did not come back.
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2018 MBM ZL1 1LE - 652 rwhp, 588 rwtq SAE
2014 CRT ZL1 574 rwhp, 537 rwtq - SOLD
2010 IBM SS Camaro VVT L99 w/ TR6060 swap, 489 rwhp, 444 rwtq - SOLD
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