The only thing I know was a friend running OTR with an '06 Ram with a Cummins. He got 2.5mpg better grossing 22,500lbs. 12 to 14.5.

It was a primitive set up. Just burning off unburnt fuel.

"The only thing to do for triumph of evil is for good men to do nothing"

"NUNQUAM NON PARATUS!"