The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1988 1500 4X4 5.7 automatic, 119,000 miles....low oil pressure?

abig84 · 07-28-2017, 08:03 PM

yeah, my 1990 was the same way for a few years. pretty much the exact same pressure at idle. i didnt think anything of it as ive had a few older 80s chevys that were the same way, had a old k5 that would drop down to zero after like 20 minutes of driving it.

what i did in my 1990 was put a bottle of lucas oil treatment in it and it bumped the oil pressure up. so who knows if it just cleaned out the sending unit or actually cleaned out the oil passages. but i idle at like 30-45psi depending where the engine temp is.

07-28-2017, 08:03 PM	#10
abig84 Registered User Join Date: Jan 2017 Location: wheaton IL Posts: 659	Re: 1988 1500 4X4 5.7 automatic, 119,000 miles....low oil pressure? yeah, my 1990 was the same way for a few years. pretty much the exact same pressure at idle. i didnt think anything of it as ive had a few older 80s chevys that were the same way, had a old k5 that would drop down to zero after like 20 minutes of driving it. what i did in my 1990 was put a bottle of lucas oil treatment in it and it bumped the oil pressure up. so who knows if it just cleaned out the sending unit or actually cleaned out the oil passages. but i idle at like 30-45psi depending where the engine temp is.