Originally Posted by KevenP
Change the oil pressure sending unit first.
I agree, wholeheartedly. I was driving my '89 Ramcharger and the bottom fell out of the oil pressure gauge. I freaked. Nothing leaking, I changed my sending unit, top of the motor near the firewall. It is a bitch to get to, I used a basin wrench out of my plumbing box.
That is all it was.