Nick, As I suspected, after filling up my tires and finding a nice long, flat 20 mile stretch of highway (from Searchlight, NV to Boulder City, NV), keeping the car at 61 mph with the a/c off I was able to increase my average mpg to 49.7. My wife and I couldn't believe our eyes. The entire 251 mile trip gave me 34.7 mpg, which is great considering the elevation changes I was making 2500 to 3500 to 700 and back. Lots of strain on the little four banger. After 108 miles at 36.1 mpg, I burned 1600ml of water with 71 mph max, 4737 rpm max, and 50 mph avg. I almost wish I lived back East where there isn't so much mountain climbing. I'd be saving a fortune. I'm having a lot of fun with this test. Thanks again for your help.