Resetting the OBC mileage calculation?

[flatlander]

My OBC Range and fuel consumption numbers are way off. The Range said 611 yesterday after a fill-up and when I started driving the numbers increased!

I know there's been threads on the computer being inaccurate. Some mentioned there's a procedure to calibrate it. Anyone got some info or links to fix this issue?

[JCL]

It is completely normal for the numbers to increase.

The miles-to-empty is based on your most recent average consumption. If you drive with a light foot on the accelerator that average goes down, so your miles-to-empty goes up. If you start up and drive through town, with a cold engine, then fill up, then get on the highway, the numbers will climb dramatically.

[flatlander]

I agree, however, it said 611 miles!? Normally I get 380-430 miles per tank.

[motordavid]

While I agree w/JCL in theory, and from seeing my range often climb after a fill, then out on highway a while later. But, I have never seen that large of a number on our E53...500-550, yes; never in the 600s.

Our Vette will show low 600s, after a fill to the brim, and then easing out onto the interstate, and rolling up to cruise speed, after a few miles.

Our X has done 550miles+ on a single tank before fill, but I have never seen '600+ range' show up. Dunno what your number means...a temp glitch, an anomaly, the EPA guessers at work, a politician's promise? ...
GL, mD

[TiAgX5]

I've seen over 600 miles to empty several time on the run from Dallas TX to Spring Hill FL. Have done the 1100 mile run with 1 gas stop. If you drive thru a full tank of gas all highway at under 75 mph and not using the brakes you will see over 600 at the fill up. I've seen over 700 miles to E doing the trip in my 6 speed manual '05 Spt Pkg 330i. The Viper does much worse!!!

[JCL]

I have no sense of whether 611 miles is possible or not. I measure in km. I can see 900+ km on our X3 with a smaller tank so I didn't think 611 was special.

[motordavid]

Originally Posted by TiAgX5

...If you drive thru a full tank of gas all highway at under 75 mph and not using the brakes you will see over 600 at the fill up. ...

As to actual distance on one tank, not 'range'...
Not suggesting it can't/won't happen, but in all my years of reading here I don't recall a post of a 600+ mile one tank run, on a gas X5.

Possible, though I don't have the inclination or patience, or the flat topography around here to go do an all day run to see if I could dupe that feat.

Fwiw, our best ever tank on the X5; cool October run from NC to NJ, no A/C, speeds under 80, etc.
GL, mD

[lowlows18]

damn .. after i fill my truck to them top it says i have 330 miles to go..and that drops pretty fast since i have a heavy foot

[flatlander]

There's got to be something really screwy with the fuel consumption on it. I reset the mpg and it's up near 23-24. My actual avg mpg is around 17, maybe 20 on long highway trips. I'd just like to recal everything.

Yeah JCL- it's pretty uncommon for my X5 to get more than 450 miles per tank.

[sterfrydude]

Lord. Mine is about 250miles but the computer numbers are higher.