coincidentally I hit 20,000 miles exactly today. The most pleasant 20K miles I've ever travelled- and that includes several transoceanic deployments!

42.5mpg on my 33 mile commute this morning, at steady (cruise control) 65mph all the way in the right lane.

41-42 has become the norm for my AM drive, 42-44 in the PM. Up from 36ish and 38ish last year. The only change over that time has been dropping from 68mph normal cruise to 65, keeping the tires at 36# instead of 32#, gentler acceleration and coasting to stops, and of course the car breaking in fully.

Nothing drastic at all, yet still a 15% increase in FE.