We have a 2016 Volt Premier with nearly 33,000 miles and well over 10,000 miles of that 33,000 is just on the gas engine, what is usually called "cs" mode.(voltstats.net) display for our Volt 46.71 mpg (cs) lifetime. My wife and I along with our 90 lb Black Lab went steelhead fishing yesterday in the Tillamook Oregon area. Temps ranged from 48-53 F, with mostly cloudy skies and mostly dry roads. Also loaded is all our fishing gear along with my wife's camera gear as well. Trip via highway 101, speeds ranged from 65 mph to 25 mph as Highway 101 from our home goes through some small coastal towns and cities. We left with a full charge and on return home the dash read: electric 58.8 miles 14.4 KWH used / gas miles 68.1 with 1.32 gallons used for 51.5 mpg. Gas used is Costco 87 octane (regular) with 10% ethanol which is winter blended as well which has a negative effect on mpg's. I would like to see the Clarity Plug in or other Plug in electrics do the same.