Forum Discussion
Tom_Barb
Jan 26, 2018Explorer
discovery4us wrote:
I don't. Cummins tech told me 15% increase in power but will see a 15% loss in mpg. Currently average 10 MPG so losing 1.5 MPG wouldn't be the end of the world and may not even lose that.
If that is Cummins program I wouldn't use it, get an after market.
Or put the Cummins program in it for free and see what it really does. If you don't like it have it taken out and re-fitted with the program you have now or a better one.
About Motorhome Group
38,763 PostsLatest Activity: Dec 05, 2025