Western Star 5700XE

Western Star2015 to 2023Aerodynamic linehaul

Western Star's attempt at an aerodynamic highway truck, using the Detroit drivetrain from the Cascadia in heavier-built sheet metal. Rare, and priced accordingly.

Fuel economy

7-8.6 mpg

loaded, at highway speed

Fuel per mile

$0.519

at $4.049 a gallon

Tractor weight

17,500-20,000

pounds, day cab to large sleeper

Used asking

$45k-$110k

condition moves this more than the model

What the fuel gap costs

Against the most efficient tractor in this reference, over 120,000 miles at this week’s diesel price.

$3,753 a year

Known issues

Low production numbers mean thinner parts availability and softer resale than a Cascadia with the same drivetrain.

Verdict

Mechanically a Cascadia in a stronger suit. Buy it if you find one cheap and you like it; there is no economic argument for paying a premium over the Freightliner.