Fuel
My 425 Cummins seems like it’s got 50 more Hp out West , we are out here on vacation I guess no humidity. Back in ky seems like it’s runn in a strain all the time. Gets about 6 mpg. It’s in a 2011 New...
Forum Discussion
If you feel a difference at higher altitudes, your motor may be running too lean. Was 2011 at DPF year? I can't imagine 425 hp would not be enough unless you're towing a Hummer.
