[dan42]

In my '10 crewcab half ton 4X4 3.73, auto, I'm getting around 14 - but that's "around town", including dirt roads/in and out of 4 wheel drive. I would be curious to see what the mieage would be in my '67 if you fitted it with an equally efficient drive train - in other words, I wonder how much the aerodynamics really effect the fuel mileage at these lower mpg levels.