[wasjr]

Krauthawk, I have had a similar experience re hwy mpg between my 17 and 20 Advance models. I track mpg on a Fuelly app. My best hwy (which was TN to FL panhandle) was 27 in the 17 vs 24.5 in the 20. However, in 8k miles in my 20, my combined mpg is 22.3; while combined mpg in my 17 was 22.0.

 

[Krauthawk]

Just got home to TN from my trip down to Southern FL. Got 26.2 mpg on the last 310 miles so pretty happy with that considering the temp dropped from 70 to 42 during that time and had some stop n go thru Atlanta. Averaged 24.5 mpg for the entire trip (1800 miles) but that was including a bunch of stop n go in Clearwater and Ft. Myers.
My total combined mileage on my 20 Advance SH-AWD thru 5900 miles and 8 months is now 23.5.