The 6.6 Duramax is one of the most powerful engines for heavy-duty trucks like the Chevy Silverado and GMC Sierra, but how many MPG does it get?

The 6.6L Duramax diesel engine is well regarded in the truck community, but what is considered high mileage for one? Here's a safe estimation.

The 6.7 Cummins and 6.6 Duramax diesel engines are both reliable and solid, but they do differ in some ways. Here's the difference between the two.