Drove to Sunshine village and back with the truck today. Just for kicks, I filled up in the morning and again in the afternoon so I could calculate my mileage.
According to the odometer, I drove a distance of 175.3 miles, and I burned 52.678 l of gas (works out to 13.916 us gal). And just in case you were wondering, Google maps agrees with the distance.
That puts my 77 460 supercab right at 12.6 mpg. Obviously this is a best case scenario, since it was all unloaded highway driving, but I was honestly expecting worse. The guy I bought it from last spring must have had it tuned right up!
I don't think I'll ever check it again, I don't want to burst this bubble.