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.

Tags: feedback real mpg

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