Can the MPG meter be recalibrate?

[ImSoAmish]

Can the MPG meter reading be recalibrated without getting a dealer involved.

[fordboyyfm]

recalibrated for what? you can reset it yourself

[ImSoAmish]

I didn't mean the MPG reset button.
Recalibrate as in make it read the MPG accurately. This is typical in other vehicles where you let it run out a tank of fuel and then somehow get the computer in a learning mode where you tell it that you ran through a tank of fuel over the last XXX miles driven. It then sets up a new slope for the fuel consumption rate vs. mph formula.

[gixxertricks]

you guys and all your technological toys.

[born2ride]

I don't think so. the last one i did was a reprogram for tank size..I dont think it does the relearn.

[ImSoAmish]

Do love my techie toys.
OK. So if there is an error I just have to keep track of how much it is and mentally keep adjust the reading.
I noticed a 2.5 mph increase in my MPG after I changed the oil (unknown miles on the oil. Just bought this truck) and added some Diesel Kleen Cetane booster. I have a small % of my homemade Bio in the tank and figured the increase in MPG was from the additive which helped the lower energy content of the homemade Bio. My MPG is 20.5 at 60 mpg on level ground. It might show higher if I ran it longer at highway speeds. Wondering if this is reasonable for a 3.73 gearset. I have yet to do a fillerup hand calculation.

[Angrywasp]

From what others have stated 20.5 is possible. Others have reported getting 18 mpg between 70/75 mph. I've been getting 14.5 strictly in town. Here in a couple of weeks I'll get to see how it does on the road for a 1200 mile trip.

[roadbyte]

I've installed the banks sixgun bundle and my mileage went from 14.5 in town to 17 and highway at 70 from 18.5 to 23

Excursion 2005

[RACERXF250]

Did You Add The 4" Turbo Back? Or The Air Intake? I Get 21-25mpg @ 75-80mpg With Cruise Set. Banks Power 6-gun Bundle
05 CREW CAB SB 4X4

[hitecdan]

Originally Posted by ImSoAmish

Do love my techie toys.
OK. So if there is an error I just have to keep track of how much it is and mentally keep adjust the reading.
I noticed a 2.5 mph increase in my MPG after I changed the oil (unknown miles on the oil. Just bought this truck) and added some Diesel Kleen Cetane booster. I have a small % of my homemade Bio in the tank and figured the increase in MPG was from the additive which helped the lower energy content of the homemade Bio. My MPG is 20.5 at 60 mpg on level ground. It might show higher if I ran it longer at highway speeds. Wondering if this is reasonable for a 3.73 gearset. I have yet to do a fillerup hand calculation.

OK, now your getting way to techie. The overhead computer is in no way smart enough to account for the energy content of the fuel in your fuel tank. It's an algorithm the counts the number of times the injectors fire and their pulse width, rpm, and maybe a few other parameter. Then it averages all that over time until eventually it stays at 17.2 mpg (plus or minus 1.5 mpg). It also assumes the fuel volume of the injectors is the same, which they may not be. I don't even think a dealer can adjust it.

My overhead computer reads about 1.5 to 2.5 off depending on the driving conditions. It's fun to play with, especially after you get on the freeway and then reset the darn thing and watch it jump up to 65 mpg for about 3/10 of a second. Then creeps down to what ever. But for those 3/10 of a second I can dream I'm getting way better mileage then that stupid Prius that won't get out of the fast lane.

[ImSoAmish]

But for those 3/10 of a second I can dream I'm getting way better mileage then that stupid Prius that won't get out of the fast lane.

In the VW Tdi forums they call that "Smileage" when the MPG numbers look really good.