If your oil pressure gage is stock the needle should be on the 'O','R', or 'M' with the engine at normal operating temperature. This equals 6, 9, or 12 psi respectively. Be sure the metal tube sticking up from the oil filter mount is in place. They will occasionally come out and get tossed away with a filter. If your oil pressure gage is an after market gage it be about a 20 psi max reading gage.