My ford has oil temp in dash but I understand cummins didn't have a place on engine for a sensor.
(could have welded a fitting into pan if I had thought that far ahead..... )
The only general area I can think of to measure oil temp would be the lines for turbo. First thought of return (drain)
line - but wondered if oil might be hotter or cooler there than in engine.
Then I wondered (!) if I could make a fitting that would bo in between the oil supply line and the hole where it screw into
the filter adapter. That intermediate fitting could have a port for the screw-in temp sensor......
Would that work OK ?????
Any failure modes ?
Tim