TheItalianJob said:
Has anyone compared the computer’s figures with manually calculated consumptions – how accurate is it?
Thought I’d try for some really good mpg figures on the
Poole to
Plymouth run over the weekend. Basic driving style was to keep it legal (of course) and only use real power for overtaking when it would put me in front so I could use downhill glides to full advantage and not get stuck behind somebody driving on their brakes!
As it so happened, the traffic was really quite heavy which, perhaps surprisingly, helped the result as it stopped me driving to the speed limit.
The result was
62.5 mpg with an average speed of 48 mph.
I’d intended to try and repeat it on the return journey but after driving along single track roads around Rame Head (lovely wilderness area south of Torpoint) for quite a while and barely getting past 2nd gear - that put paid to that.
Nice clear roads on the way back so it was a good chance to see what the motor could do
and this brought the consumption for the complete round trip to
57.9 mpg.
After a refill the trip computer indicated 587 miles for a full tankful with an average consumption of
54.9 mpg.
Now here’s the crunch! - the actual fuel I put into the tank indicated an average of
51.4 mpg
There’s a possibility I didn’t fully fill the tank on the previous fill-up so to double check I’m going to be visiting the exact same pump number next time to see if I get the same error.
Not exactly sure how smart the on-board computer is but since is has sensors for both
fuel use and
fuel used it should be able to re-calibrate itself so it should be interesting to see if it does.