The 1/2 ton pickups with small diesel are pushing upwards of 30mpg, so not surprising at moderate speeds a small MH getting 25mpg
Well certainly would be pretty not surprising, they do not have GVWR's of 11,000lb, more in the 7000lb range, and are not towing a small SUV dinghy like a Motorhome. A 11,000lb GVWR is more 3/4 to 1 ton Pickup Truck
" moderate speeds" 70mph or 110kph?????
A half-ton or 150/1500 model typically falls under an 8,500-pound GVWR. A three-quarter-ton or 250/2500 model ranges between 8,500 and 9,990 pounds. A one-ton or 350/3500 truck is likely to be 9,900