I am a Duramax owner, Just bought a 2010 2500 HD with 6.0, looking for suggestions for add on's to increase fuel mileage. I get reimbursed from work based on miles driven at about 1500 miles per month if i can get at least 2 mpg that's $200.00 bucks in my pocket I've had the truck three weeks now and most 90% of driving is interstate miles, I had one tank average 15 mpg but most have been 13 mpg. Looking for things i can do over next srveral months that will benefit. i don't mind spending the money but would like to spread it out over time. Curious to see what has worked for other people?

 

if ur getting 13mpg in a 6.0 consider yourself blessed. mine gets 12.5 everywhere no matter what and i have a much of add ons. But for more mpg, try a CAI and a custom tune via blackbear performance. those were the best mods i put on mine.