what is the oil pressure gauge in my 95 supposed to do? i thought from posts i've seen on here that it should move according with rpms, but since ive gotten the car, the oil pressure gauge has slowly but surely just gone up, it used to just be stuck right about at the middle of the gauge, and now it looks like this.



my guess is that its clogged? where is the sender unit at? any other tips or is it working ok. car runs just dandy, no oil trouble except piston 4 valve tick when the oil gets too old.

thanks

 

You have an idiot light with a needle instead of a bulb, where as '90-'94 Miatas had an actual gauge.

Buy the sender and gauge from a '90-'94 and replace your current gauge and sender. The sender is on the passenger side of the engine, below the intake manifold, behind (towards the rear) of the oil filter.

http://www.miata.net/garage/opg.html

 

Get an aftermarket oil pressure gauge.

FWIW, mine stock gauge isn't even an "idiot light". I unplugged mine near 3,000 miles ago and it still reads normal... So with no signal going to it at all it still reads just fine.