We are home now got 26 mpg coming back..one strange thing on the trip up..in the mountains the temp outside dropped to 50 degrees that night and I watched my temp gage drop to the cold mark..stoping to check it the engine was not hot and everything was normal..I run a 180 degree theromastat and a water wetter chemical ..I surmised the theromastat stuck open and changed it to a 195 when I got to Quincy..temp running normal