I just got this 2 weeks ago. I still have 50/50 warranty with the dealer but anyways saturday I did an oil change with new filter and castrol 10w30 engine oil. The pressure always stayed below 40 and after I did a coolant flush it started hitting 80. I'm very worried about this. Did I use the wrong type of oil? Or is it a bad oil pressure sending unit? Thanks for any help

 

Most likely a bad oil pressure sending unit.

When they fail, usually they fail with abnormally "high" readings.

I buy these directly from Jeep for best reliability/accuracy/mating with the factory gauge.

 

Do you think it is okay and safe for me to go to work tonight. My job is approx 40-50 miles away. I'm new to Jeeps lol

 

Yep, Id say its a bad sending unit also. Did you get any water/coolant on it when you did that flush, or bump it when changing the oil? Either of these might be the culprit. Ive got coolant/water in the sending units connector before and it did this. Took connector off, blew the coolant/water out, and Di-Electric greased it and was fine. Also, accidentely smacked one one time with wrench and messed something up inside and it did this also. They are cheap, around $25.

 

Im sure the Oil Pressure Sending Unit is faulty, and if that is the case,, the Jeep would be safe to drive. Just as long as that is the problem.

 

Maybe when I did an oil change some engine oil from the old oil filter might have ruined something. I'll look around the unit I guess.