I'm sorry sir, you are incorrect. We don't have any kind of gallons. Our volume is calculated in liters. You can see this just before the brackets. The MPG shown is for US folk, and simply just the Jeep manufacturer lying through their teeth.Yes the U.S gallon is not the same size as the Canadian or imperial gallon.
When I originally saw the U.S mpg's for the Wrangler I almost said forget it until I realized it was American, it would have been worse than my Hemi C...lol