I agree that fuel range sould be a consideration for people who do some traveling. We have made 3 trips to the west coast, from Vermont, and even in the lower 48 there are, or were, several stretches of over 100 miles between gas stations.
If you are expecting 12mpg i think this is very optimistic. We range between 8 an 10 mpg with about 9 being average. Of course my rig is 12 years old but the same engines are still being used.
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