We're returning from a mostly high altitude trip in Idaho-hot-pulling 9000 lbs. We keep records of our gas usage, and usually average 8.5 mpg, but this time we started with a couple tanks of the highest test gas we could find, and continued using non ethanol as often as possible. So far, the EVIC shows 11.4 mpg. One factor might be that we aren't driving too fast in the mountains, and speed kills our mpg. Is the extra 50 cents a gallon worth it? Maybe, maybe not. However, we're out to have fun!
See ya out here