Miles To Go Before Empty

[200h]

i know the on board mpg figures are never right but i am not sure if i may of found the reason why,

it could also be the reason why when the fuel guage reads empty you still have a good few litres left.

the other day i had been driving on batteries and had the miles to go before empty screen on the display

and i noticed that even on batteries the miles to go where going down i started at 24 miles before empty

and ended up showing 19 miles before empty when i got home, now surely traveling on batteries this

figure shouldn't change, has anyone else noticed this.

[Rich2508]

I wonder if because you were travelling mainly on Battery for the last part, you did not have any charge left in the Battery and it's clever enough to think that it will be using more fuel for a while as the batteries won't be giving their input?

My mpg is about 3% out some of that error rate can also be down to speedometer calibration, if that is the same feed as the mileage recorder mine is 5% out, so if that inputs into the mpg figure could affect the overall reading of MPG?

[200h]

i had plenty of Battery power left the road i had been travelling down is flat / slightly downhill so Battery use is very minimal,

as i dais i thought is it was strange to see the miles to go getting less