OBC fuel distance estimator wonky

imperialgdp · Post by **imperialgdp** » Mon Nov 23, 2020 12:26 pm

Hi all, new owner of used 23i. All is great, except the fuel distance estimator is very tempermental. Half a tank estimated to get 130 miles which is not much at all, but it goes down unproportionally quickly. As in as soon as I put my foot down I will lose at least 1 mile. A 2 mile drive will cost me 5-10 miles on the OBC at least.

I have reset everything after I got the car, reset adaptations and upgraded the software but still seeing the same thing.

Nictrix · Post by **Nictrix** » Mon Nov 23, 2020 1:22 pm

It all depends how and where you drive the car, if you were to join a motorway right after filling up you would see the mileage going up

Smartbear · Post by **Smartbear** » Mon Nov 23, 2020 1:25 pm

imperialgdp wrote: ↑Mon Nov 23, 2020 12:26 pm Hi all, new owner of used 23i. All is great, except the fuel distance estimator is very tempermental. Half a tank estimated to get 130 miles which is not much at all, but it goes down unproportionally quickly. As in as soon as I put my foot down I will lose at least 1 mile. A 2 mile drive will cost me 5-10 miles on the OBC at least.

I have reset everything after I got the car, reset adaptations and upgraded the software but still seeing the same thing.

If you put your foot down you will quickly halve the economy, the obc detects this & lets you know

Rob

Argyll Andy · Post by **Argyll Andy** » Mon Nov 23, 2020 1:42 pm

As stated, it varies so much on driving style, it’s at best an estimate on driving patterns since it was last reset.

I just go by when it drops to about a third I fill it up as it’ll need fuel soon no matter what the OBC says

jabber · Post by **jabber** » Mon Nov 23, 2020 1:49 pm

The lowest I have ever got on the fuel estimate was 7 miles I was on along journey and was struggling to find a petrol station

Nictrix · Post by **Nictrix** » Mon Nov 23, 2020 2:48 pm

jabber wrote: ↑Mon Nov 23, 2020 1:49 pm The lowest I have ever got on the fuel estimate was 7 miles I was on along journey and was struggling to find a petrol station

It does go to zero or if I remember its ---

imperialgdp · Post by **imperialgdp** » Mon Nov 23, 2020 3:37 pm

Ok thanks all. What kind of mpg do y'all get? Average I guess as I imagine driving style varies here.

Danglesberries · Post by **Danglesberries** » Mon Nov 23, 2020 4:05 pm

Average

Nictrix · Post by **Nictrix** » Mon Nov 23, 2020 8:22 pm

A tankful can vary by over 100 miles depending on how you drive on different trips.

Ole gits rule · Post by **Ole gits rule** » Mon Nov 23, 2020 8:42 pm

I am getting around 35 to 36 in my 23i in mixed driving (mostly decent roads though).

Stevo1987 · Post by **Stevo1987** » Mon Nov 23, 2020 9:01 pm

I think I average about 25 mpg. I did do a a run down to Essex and got about 37 by my rough calculations. I did have "her indoors" with me so no sport mode and no flooring it.

mr.tourette · Post by **mr.tourette** » Mon Nov 23, 2020 9:07 pm

i average 29 in a 23i, heavy right foot

Argyll Andy · Post by **Argyll Andy** » Mon Nov 23, 2020 9:46 pm

mr.tourette wrote: ↑Mon Nov 23, 2020 9:07 pm i average 29 in a 23i, heavy right foot

You’ll need to try harder, that’s a ridiculously HIGH mpg

mr.tourette · Post by **mr.tourette** » Mon Nov 23, 2020 9:51 pm

Argyll Andy wrote: ↑Mon Nov 23, 2020 9:46 pm
mr.tourette wrote: ↑Mon Nov 23, 2020 9:07 pm i average 29 in a 23i, heavy right foot
You’ll need to try harder, that’s a ridiculously HIGH mpg

That dude up there is getting 34^^^

I get 24 on a fun run but there's my commute thats bringing the average back up and there's been more commuting in it than fun lately.. lockdown n s**t y'know

Argyll Andy · Post by **Argyll Andy** » Mon Nov 23, 2020 9:56 pm

mr.tourette wrote: ↑Mon Nov 23, 2020 9:51 pm That dude up there is getting 34

Was it on a transporter?

that’s the only way I’d see that. 23i was about 21 ish and 35iS was 12.7 on last proper fun run

Mine is only a fun car but I did manage 26.4 average on last weekends run to John O’Groats

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