For anyone interested. I just made a trip from Michigan to Cooperstown, NY and back. The JGC Overland with 6 cyl. I kept good track of the mileage and it was figured the old fashioned way. No computer results for me. Miles/gallons. Here are the results in order: 25.44, 26.004, 26.5, 22.15, 22.2, 27.14. The two @ 22+ were city/country, and the other 4 were freeway. I am happy with the results.