RamGuy2500 wrote:
What type of fuel mileage are you all getting with your Cummins and does it help adding cetane boost. I'm averaging 15 MPGs in mixed driving but I drive it pretty hard off the lights. :B Towing I'm getting around 10.5 to 11 on the interstate with a 11K fifth wheel. I should mention I got the 68RFE trans with 3.42 rear end.
I apparently suck at starting threads because my last two have been killed off. Maybe third times the charm.
I get about the same as you with the Aisin and 3.73s
I do get 20+ on the highway unloaded though.