When your oil pressure really is low it will pop up a message in the information box. As for aftermarket oil pressure gauge,,your other gauges (volts, temp, fuel, speed,tach) are going to start crapping out also. Save your money for the new cluster.

 

[my gage is running at 85 I already changed the oil, the gauge goes to zero when I shut off the engine, someone told me it is is the oil pump, QUOTE=outdoordb;78841]When the key's off should the gauge return to zero ? Mine drops to 40. Also having a hard time finding the sending unit , any tips ?[/QUOTE]