Originally Posted by heynavt1
I can't speak to others and their recommendations for the DPF delete. I tend to keep everything stock regardless. Like you I was getting around 18 on the highway with my 2500 Mega-cab cummins (9 to 10 pulling my 12000 lb 5er). Mon I took it in to the dealer for an oil change and asked if there was a software update for the radio. When I got it back was told there was not a radio update but they had flashed a new program for the fuel/engine management computer. On the way home I noticed that my instant MPG was running significantly higher than before. All the roads are flat and straight out here in the high plains so it wasn't the road. Went from the 15-18 range to the 22-26 range. I had just filled the tank the day prior (all the way to the nozzel port) and where I had gotten about 100 miles before the fuel gauge needle came off the full peg I have now gone 130 miles and the needle is still pegged full. We'll see what I get at the next fill up but it looks like the new program they flashed has upped my MPG. I'll let you all know how it goes.
Thanks for the info. I have the same truck and only get between 14 and 16 MPG.