I have a '96 2500 Ram pick-up and i've noticed recently that the oil pressure guage has been fluctuating. I use it to tow my camper with quite a bit and it's never done that before. I was wondering if anyone could tell me what could be causing this fluctuation and what I need to do to fix it. I would be greatful for any help. Thanks.

 

Most likely the sending unit. Mine did the same thing and a new sending unit took care of it. It is located at the rear of the engine, on the passenger side of the distributor.