5.9 Cummins fuel mileage
So a guy at work just got a 07 5.9 mega cab 4x4. Sitting on 35" with a 4" lift, has a 4" exhaut and no programmer. He just filled her up 524 miles and 30 gallons of fuel. That works out to 17.4 mpg. He said he did about 80 miles of towing with that fill up too. A few other people I know with the 5.9 all claim 20+ mpg. My question is how or why is the cummings more fuel efficient? You can look in my sig, I get 16 mpg around town.
2006 LBZ, White LT, CC/SB, 4x4, 6.6L, Auto,
EFI Live (Kory Willis)
EGR blocked/PCV rerouted
Nicktane adaptor CAT 1R-0750 & Fumoto drain valve
AD 2 165 with CAT 1R-0751
WeatherTech, Rino-lined, Russel SS brake lines
5'' SS DE w/muff
Curt 18K 15602
Michelin LTX AT/2 265/75/16e
Last edited by buttapollock1010; 04-09-2012 at 11:10 AM.