Quote:
Originally Posted by Jughead028
2. My trip computer said fuel usage was 11.9 l/100km, but when I filled up and checked, it worked out to 12.6 l/100km. Is this a known issue? An adjustment needed?
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This is less of an issue that what you think or it appears to be. If this is your first time checking the difference...the difference is only
0.7. If you were to keep a chart...you'd probably find out like I did...that when both MPG's are charted...when averaged over a period of time...they really aren't that far apart.
I keep an Excel chart of every fill up and the "actual" MPG vs the OBC's MPG hardly ever are the same. But tracking of each and averaging them over an entire year...you can see that they really aren't that far off from each other.
In the chart below from 2013...note that the year end total is
14.47 MPG for the "actual" mileage (tank miles/gallons) and the year end total for the OBC is
14.84 MPG. That's only a difference of
.037...which is a very small margin: