Depends on several factors. The motor, transmission, rear end gears, and tire size, along with how you drive it all play a big part in fuel mileage. A century class is one of the most aerodynamic trucks on the road. I drove a 2005 Century with a straight 10 speed tranny, a Detroit 60 and 22.5 in lo-pro tires and I consistently saw 7 mpg pulling decent weight on relatively flat ground for the most part.
12 miles per gallon
Better driving habits are usually the first place to start.
190e- 25miles per gallon 190d- 35 miles per gallon
Between four and eight, depending on the gross weight, drivetrain, and speed you're driving at.
about 40 million miles to the gallon so you only have to fill it up once
20 miles to the gallon 20 miles to the gallon
15 miles to the gallon 15 miles to the gallon
This varies by terrain, truck characteristics and specs, and overall weight. With a Freightliner Columbia equipped with a 12.7 liter Detroit Diesel and an aluminum flatbed trailer, I was able to carry a maximum of 46,000 lbs (23 tons) with fuel economy of between six to nine miles per gallon.
(758 miles) x (4 dollar/gallon) / (14 miles/gallon) = $216.57 (rounded)
About 21.4 miles per gallon. (300/14 = 21.4)
Between 13 miles per gallon and 16 miles per gallon.
it can get 8 miles to the gallon