Optimistic dials
I'm sure you are aware that trip computer mpgs are optimistic by 5 - 10%, so that readers' figures based on these are unrealistic and optimistic. If I submit a figure (for a Honda Jazz), it would be based on real calculations from mileage and top up, but, I suppose even that is optimistic as the odometer will read 5 - 10% high.
Asked on 11 September 2012 by Derek Lowe
Answered by
Honest John
Well yes. My BMW is registering 72, but the calculated mpg is 65 and the odo may be about 1% optimistic.
Real MPG enables you to register the fuel economy you are actually getting against your make and model of car, its engine and type of transmission.
Every time you enter an average consumption figure against your car, the overall average automatically adjusts to reflect it.
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