Best fuel mileage, Cascadia, Pete, or LT

The brand of the truck won't matter much. It's what's under the hood and between the tires that matters.

 

What he said

 

Yup that is pretty much 100% spot on. However if you take one if each in thier most popular typical fleet specs. Crapcadia will be best,

 

The 579 won't be even close to the other two. Are you talking late model? Coin flip.

 

Yes i second that motion and also its how you drive can make a big difference as well a driver running his truck at say 60 mph will get better economy than one running his at 68 mph.

 

100% agree.

Between the three aerodynamic trucks there is virtually no difference... +/- 2%

... the biggest difference is the proper specifications of the Driveline. That can change MPG by 15% + with good or bad specs.

Motor specs, transmission, gear ratio and tires

 

If you're just judging from an aerodynamic look, its a toss up. It's so many things that factor in fuel mileage. Good filters, fuel injectors, regular oil changes, idling, weight of the load, speed going down the highway, tire pressure, dirt accumulated on the truck and motor, even the trailers with those trailer skirts and wings in the back, affect fuel mileage

 

You also forgot it’s whats between the ears part

 

The prime cascadia 2019 gets around 8.2 at 60 mph taking it easy on speeding up with 78-80k refer driving Appalachian highways. Lower to a 65 to 70k and great plains to midwest got 11.4 mpg at 60 mph cruze control.