[JFP in PA]

Originally Posted by pk2

JPA_PA

A water to oil cooler makes them (the fluids) the same temp and that is 220-210, O.K. Why does my oil appear to be 188f. If you read my methodology & you get the logic, I think it's pretty sound. If you got a better method, let me know. Punch holes in mine. I don't care as long as the the numbers add up.

The problem is your methodology; you are not measuring the actual temperature of the flowing oil, you are measuring the outside metal of the sump using and indirect (non contact) method…………..there is no way your oil is circulating at 188F if you are running the OEM stat……………The M96’s coolant is pulling heat out of the oil once the engine is up to operating temperature, the oil typically is running 20-30F higher than the coolant…………………….