Went to go on my trip and got bout 70 miles from home and oil pressure light came on, so I go to stop and it goes out, so I get on the throttle and the light comes on till 4,000rpm then goes out so I let off and the light came on at cruise rpm 2,700. I crusied 30 miles to the next town with no issues and no rattling or anything from the engine. I got to the town and swung into napa and got a new oil pressure sensor and put it in cause the old one was leaking and that's why i kept goin, thought it was just the sender. So I get new one in and same thing. So I called my dad and he came down with an oil pressure gauge and my buddy and I had breakfast while we waited. He decided to come and have mom bring the car so that if there was issues we could just go with her car. So he gets there we put a gauge on it and the pressure jumps to 30 psi at an idle. When you rev it up it rapidly falls down close to 10psi and then very slowly started dropping more. So I shut it off and went and talked to the guy that owns the perkins it was parked at and he said I could leave it there. So we took moms car and I'll get the trailer and haul it back monday. Thing is I've never seen one loose oil pressure when you rev it up, usually it's the other way around. I'm not sure if i hurt the motor by drivin it or if it may have had enough oil to keep things lubricated. I'll pull the pan and check bearings next week and see if I can find a problem. Until then anyone seen this before???? I guess worst comes to worst I'll have to rebuild it.