- Sep 7, 2004
My current engine has only ~12k miles on it and it's from a '01 car. Now I've noticed that oil pressure isn't as high as it should be at high rpms. It's an I-4 engine that spins up to 8500rpm and oil pressure only goes up to ~65psi (measured by an autometer electrical gauge). Ideally I should expect to see about 75-80psi near redline. I have added a small mocal oil cooler that has added an extra qt. of oil to capacity. I'm using 5W-30 Mobil 1 SuperSyn oil. My question is should I try using a heavier weight oil like 10W-40 in order to see the necessary oil pressure? I know this is a relatively tight clearance engine (as are most imports) but I highly doubt the loss of oil pressure would be from worn bearings at such a small amount of mileage. I did pull this engine from a salvage car, so I don't know what kind of care went into it for the 12k miles it wasn't mine. Thoughts?