262ci Forum (4.3)
1994 GMC Sonoma 4.3L vortec Z vin
At 166K miles, my engine is now starting to drop in oil pressure. Start cold idle at 50PSI. After it's warmed, it will idle at 40 PSI, and above 1K RPM, its 45PSI. But it seems these days, after an hour of driving, my oil pressure slowly drops, and by the time I...