[Bob86ZZ4]

I've put a little over 6k miles on mine this summer. I'm very meticulous about tracking my mileage. My rig weighs about 27k with full water tanks. I tow a enclosed car hauler about 50% of the time. I most often cruise at 68 mph on the highway. The worst mileage I've gotten is 8.1mpg. The best I've gotten is 9.8mpg. I don't often use the generator, I bet about 20 hours I've got on that. I go about 6-700 miles between fueling. Most of my tanks I'm over 9mpg. That 8.1 was out of character. My engine only had 53,000 miles when I got my coach. I've heard they start to get better mileage around 100k. I don't know if those MB 450 engines would get better mileage than my pre-emissions Cat C-12. My son drives truck over the road. He drives a company truck, Columbia, with the MB450. He runs right at 80k lbs. half the time, when he's delivering. And I don't know how much empty on the returns to the mill. I guess about 30k since his loads are about 50k lbs. His truck is governed at 66 mph. He gets about 5-6 mpg.