Trenton Sauer
OBS Enthusiast
What is good idle oil pressure. After my truck is warmed up it fluctuates around 15. I have a 1991 GMC 2500 305? Idk if that is good or not.
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
My truck is a light duty 2500 so it has the 305 and only a 6 lug. But a truck is a truck.Most 2500's have a 350 but either way 15-20 psi is good, the factory gauges aren't spot on accurate. If you are worried you need to hook up a mechanical gauge.