Cummins12V98 wrote:
I will bet towing them side by side they will get similar mileage. No way 1-2 mpg different. Running solo maybe.
The larger efficiency engines get better fuel mileage than the performance versions even when towing. An engine with a higher compression ratio will be more efficient than the same engine with a lower compression ratio at all engines speeds and loads due to its higher thermal efficiency.
This higher efficiency is represented as a percentage so a 20% increase for example of a higher number will be be greater numerically than a 20% increase of a lower number. For example, a 20% increase of 15 mpg is 18 mpg while a 20% increase of 10 mpg is 12 mpg.
