i am only getting hig 13 low to mid 14, but i have been doing a little reading about swapping over to a cold air intake, (but would have to be a good one like k/n) and matching up with a bullydog perfromace module. Supposedly this can add up to 2 to 4 mpg.
Now I do know this, my mileage was about 11- 13 before i have the throttle body cleaned and the injectors flushed.
I have also been doing a lot of reading about gas in general, and this goes cross platform from gas to diesel. Some oil guy who has worked in pertol for the last thirty years said that these steps would help in maintaining better fuel econ.
1. is to get fuel early in the mornings, that the colder the fuel the better liquid fill you get, this has to do with molecule expansion to the conversion of a liquid to a gas. the colder the fuel the less vapor and more liquid.
2. if the handle to the pump has the lock notches, set it on the lowest one, for the slowest fuel fill. apprently if you run it wide open the nozzle is returning part of what your paying for back into the pump due to a vapor return built into the pump. the slower the flow the more actual fuel you get.
3. never get gas while a fuel truck is on site. while the dumps are being delivered it is stiring up sedimate from the bottom and potentially sending trash into your vehicle.
4. finally try to keep your truck above half a tank at all times. You know the old saying it seems like the first half lasts a while but the second half seems to burn faster. turns out its true, the more room in the tank to more opportunity the fuel has to evap and turn into a gas and not a liquid.
i've been doing this for about a month, and though my on board fuel econ still says 13.6 -14.1 when i do the math on my milage vs gallons I am showing more like 15 to 15.5
