on a recent road trip out to Alabama and Mississippi, the Duramax diesel gave me 23.5 mpg. Found Diesel South of Jackson MS for $3.59 and filled the 60 gallon tank in the bed of the truck. The truck should be good for about 1600 miles on a complete fill up. Performance was superb. I had an occasion to use the 4x4 selection on a red clay muddy, steep Mississippi hill. Zero issues.
I like the truck a lot.
