Birchall
Dick Chown Award 2016
I have heard people comment about the innacuracy of the DIS average MPG figures.
I have been checking mine over the last three months and I have found it to be very accurate.
My check is using the “full to full” method.
I fill the tank each time to the full capacity ensuring that I let the fuel settle for a few seconds and then fill again until it auto shuts off.
I check the trip meter and therefore have a reasonable idea of the true MPG.
Then I zero the trip and do the calculation at home.
Importantly I also zero the average MPG on the DIS so that it is measuring this tank and not including previous journeys.
One thing that that helps my accuracy is that I run slightly larger diameter tyres and this happens to compensate for the 3% or so over-read of the speedo.
So I am quite impressed. Over 10 fills it has been spot on each time!!!!
One thing that is innacurate (or should I say optimistic) is the range at the fill up.
It becomes more accurate as the tank empties but it seems to indicate a range that would leave the tank bone dry.
Steve B
I have been checking mine over the last three months and I have found it to be very accurate.
My check is using the “full to full” method.
I fill the tank each time to the full capacity ensuring that I let the fuel settle for a few seconds and then fill again until it auto shuts off.
I check the trip meter and therefore have a reasonable idea of the true MPG.
Then I zero the trip and do the calculation at home.
Importantly I also zero the average MPG on the DIS so that it is measuring this tank and not including previous journeys.
One thing that that helps my accuracy is that I run slightly larger diameter tyres and this happens to compensate for the 3% or so over-read of the speedo.
So I am quite impressed. Over 10 fills it has been spot on each time!!!!
One thing that is innacurate (or should I say optimistic) is the range at the fill up.
It becomes more accurate as the tank empties but it seems to indicate a range that would leave the tank bone dry.
Steve B
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