i have a 2001 4 door dodge.5.9l.. when i am at idle.my oil pressure drops.when i rev it up or start to drive, i goes normal. i just had the oil changed, i'm wondering if it is coinsidence, or maybe the techs at wal-mart did something to it. can anyone, help me?

 

How low does it drop? It is normal for the oil pressure to be lower at an idle and go up with the engine speed. My R/T , at operating temperature, bottoms out at 25psi when idling and goes up to 65psi at freeway speed. On a cold start it's 75psi idling and 100psi+ at 3,000 RPM.