Hi there, I have an 87 3.0 pathy with 212,000 miles on her. When I start it up, oil pressure is great, as the engine heats up, it drops lower and lower. Once at running temp, the oil pressure is at 0 and the oil light comes on. 5 days ago I changed the oil and filter, as well as a new sending unit put in (old one shorted out and was maxing out the oil pressure gauge).
When its low, I don't hear knocking or anything, performance wise nothing changes. My pathy is running very rich right now, but not so rich that it thinned out the oil that quick.
Rock auto has a cheap sending unit, and an expensive one, I tried the expensive one first, that did the same thing until a bare wire touched metal then shorted out the sending unit.
This time I bought the cheap sending unit.
Should I run thicker oil? Anything else I should look for? During my next oil change, should I have the filter and oil inspected for excess metal? I figure this old dog is just tired and about to die.