New Ram/Cummins vs GM/Duramax on the IKE

4x4ord wrote:
13 % better fuel economy with the Duramax is significant. Especially considering it likely ran at a higher rpm than the higher torque Cummins.

The Duramax computer said 3.4 mpg, Cummins said 3.6 mpg.
Either way, I don't think it means anything.