· COTM Winner
2014 Cruze Diesel, 2007 Cobalt, 1981 Camaro Z28, 2017 Volt
Our best tank ever of 57.4 was started just before we got back into Michigan (Ohio Turnpike) - as soon as we did, cruise was set up to 75 (and I went WOT to get there upon crossing the state line). We filled up about 100 miles later of a solid 75 mph on the highway (mixed with a couple miles of city), in ~40 degree temps, and got that.crazy talk
yet to see a DIC pic of high mpg with high mph.
Watching the instantaneous fuel economy - which was something I did the entire time I was driving down and back from NC - it really seemed to favor 70 mph vs 65 or 60 mph.