Be careful when switching, that switch also toggles between miles and kilometers. On my second fill up with my new diesel coach I calculated my fuel mileage and got 12MPG! Way better that my previous gas rigs got. I was bragging in the campground that night and my neighbor said "no way Jose, you are reading kilometers". He was right and I felt pretty foolish.
Rich & Kathy Bock
2005 Itasca Meridian 39F