Larry, I'm not aware that my '88 M103 has a detonation sensor. Maybe the later models???

I run 87 PON in cool weather. If I short shift and get on the throttle too fast, I get a little transient detonation, so I've just adjusted my driving habits to load throttle a little slower on short shifts, or rev it up a little more.

87 might not work in the heat of the summer with the A/C on and 100 degree coolant temperatures, but I just use my 190 from about Thanksgiving to Memorial Day.

Duke