Ford's 6.7-liter Power Stroke diesel engine has been used in pickup trucks since 2011. Here is what drivers claim as the mpg ...

The Ram Heavy Duty can seat up to six, and it competes with the Ford Super Duty and Chevrolet ... while a Cummins turbo-diesel 6.7-liter inline-six that makes 370 or 420 hp and a six-speed ...

That’s not the most powerful diesel on the heavy-duty market (that would be the Ford Super Duty’s High Output Power Stroke diesel’s 500 hp and 1,200 pounds-feet), but despite the updates ...