Cummins Publication on Tires & FE

[redpoint5]

I used to be astonished at how little impact a yard of gravel had on FE in my diesel truck when cruising open roads. I found that my gasoline car when heavily loaded with passengers performs very similarly when on the open road. An object in motion...

[Diesel_Dave]

Ok, now I understand what you're saying. There may be something to that. Turbodiesels tend to have much higher low-end torque than gassers. Therefore they can be geared so that you can pull a heavy load with low speed and high torque, rather than having to run the rpms up. Therefore the diesel can be more efficienct than a gasser under heavy load, but the rolling resistance is the same.

[silverram323]

Interesting read. Thanks