[brucepick]

Since my last post I've had the HX out for two 60-mile commute runs plus other driving.
On one long run, it went into Lean Burn stayed there.
On some of the other trips, it developed the "rpm sensitivity" I described.
I wasn't able to identify yet what causes it.

Anyway, the 23-mile thing is not consistent. RPM-restricted Lean Burn has kicked in at other distances that were further than 23 miles.

In the time since the last post I had a shop do an injector/valve/upper cylinder cleaning. Because my good wife heard "ping" - I want to get all the carbon cleaned out to help eliminate early detonation. They put the last of the cleaner into the tank so that fuel is not standard fuel - I think I can smell the cleaner in the exhaust.

I'll be driving again the next three workdays so I'll see how it goes.