Mpg Trip Computer Accurate

[ziauris]

Hi,

Recently started taking my Auris 1.6 VVTi petrol 07 plate on the motorway and the trip computer is showing average fuel consumption as 45.2 miles per gallon. Is the trip computer accurate or not?

Thanks

ZIauris

[FROSTYBALLS]

The trip computer info is likely to be optimistic - and I think this will apply to most cars. The only way to get accurate figures is either to use Fuelly or calculate the consumption yourself using brim-to-brim figures when you fill the car up.

[Miseryguts]

If you want to feel happy look at the computer.

If you want the truth do the brim to brim test.

The truth always hurts :-)

[Joe2014]

I just bought my Auris 4 weeks ago, computer is stating 55 mpg average, of the two brim to brim fillings I have done, both have returned over 50 mpg, so no complaints so far.

[HARDO421]

Also my trip matches a full tank test:)

[Uncle Buck]

Mine's actually under-reads - the reality is approx 1.5 MPG better than the trip computer reckons. As the yanks might say - 'Go figure !' :)

[RunningInPleasePass]

After 25k miles of keeping records with fuelly, my MPG display works out about 7% optimistic, the real MPG is averaging 60MPG, very pleased with that!