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Model specific boards => Golf mk4 => Topic started by: Car nut on 05 June 2009, 20:33

Title: MPG Reading on dash
Post by: Car nut on 05 June 2009, 20:33
I've noticed the MPG figures flickers up and down....

Is there a reason for this?

My wife's '58 A3 cabriolet has done this since new so I think this mY have an issue as well.
Title: Re: MPG Reading on dash
Post by: alex160 on 05 June 2009, 20:37
are you looking the currunt mpg figure? if so this will change all the time your driving, you want to view the average mpg, this gives a more relistic figure, it will go up and down though as your driving.
Title: Re: MPG Reading on dash
Post by: navmk4gti on 05 June 2009, 22:10
thats normal mate.. there are 2 readings tho .. one gives you average milege and the other i think gives overall mpg ..which changes all the time through throttle response..

the one you want to look at has a circle symbol with a line going through it  :smiley:

if i had pics id be able to explain better so ill take some tomoz morning if you like
Title: Re: MPG Reading on dash
Post by: davetec-s on 06 June 2009, 10:22
once your on the mpg that changes quite drastically press the down button once on the stalk an it will take u to the actual mpg which will say like 34.6 instead of 137 which is more realistic lol also has a circle on the left hand side with a line through it. If u flick trough your car manual for the digital display it will tell u them all. how long u have been drivin, the miles covered in this time, average speed, average miles and the actual miles per gallon for that journey :D
Title: Re: MPG Reading on dash
Post by: gaz_marshall on 06 June 2009, 11:16
I have a bit of a query about that as well. On the mpg with the circle with the line through it averages 19-40mpg- fine. The other mpg figure however shows crazy readings all the time, literally from 7mpg to 200mpg back and forth- is this normal????
Title: Re: MPG Reading on dash
Post by: Ivor Mk4 Turbo on 06 June 2009, 11:26
I have a bit of a query about that as well. On the mpg with the circle with the line through it averages 19-40mpg- fine. The other mpg figure however shows crazy readings all the time, literally from 7mpg to 200mpg back and forth- is this normal????


Yep.  That's 'real-time' MPG.  It will change with each & every throttle adjustment.  The useful figure is the average MPG figure.
Title: Re: MPG Reading on dash
Post by: navmk4gti on 06 June 2009, 12:45
i will never understand why VW neva put in miles to empty instead of this average crap  :angry:.. gotta get vag tech or something to do it which aint cheap  :sad:
Title: Re: MPG Reading on dash
Post by: Ant1981 on 06 June 2009, 12:57
Well some people like to know the average, it's the only way they're going to know what they are getting.
Title: Re: MPG Reading on dash
Post by: navmk4gti on 06 June 2009, 15:33
yh but you dont need to know the other reading which changes from 7 - 200!!!!!!! depending on your throttle reponse  :undecided: :laugh:
Title: Re: MPG Reading on dash
Post by: dubcruiser on 06 June 2009, 15:33
Yeah I got both (thanks to a certian member on here!! :afro:) and I use both as well  :smug:
Title: Re: MPG Reading on dash
Post by: navmk4gti on 06 June 2009, 15:37
luky u dubcruiser  :smiley:

when i got the cash i will be investing in miles to empty too ..

is it accurate tho???
Title: Re: MPG Reading on dash
Post by: Ivor Mk4 Turbo on 06 June 2009, 16:07
luky u dubcruiser  :smiley:

when i got the cash i will be investing in miles to empty too ..

is it accurate tho???


Erm, no.  At BMW back in the day, we used to get recoveries in which had run out of fuel because they're 'computer' said they had 16 miles left. :rolleyes:

I know.................................................... Just use your fuel guage! :rolleyes:
Title: Re: MPG Reading on dash
Post by: Ivor Mk4 Turbo on 06 June 2009, 16:09
i will never understand why VW neva put in miles to empty instead of this average crap  :angry:.. gotta get vag tech or something to do it which aint cheap  :sad:


They did!!!...................................................................  Eventually!! :P

You've just got the povvy old one! :D
Title: Re: MPG Reading on dash
Post by: navmk4gti on 06 June 2009, 16:31
i will never understand why VW neva put in miles to empty instead of this average crap  :angry:.. gotta get vag tech or something to do it which aint cheap  :sad:


They did!!!...................................................................  Eventually!! :P

You've just got the povvy old one! :D

thats harsh  :sad:... :laugh:
true you should never rely completely on it but its good to have a ruff estimate  :smiley:
Title: Re: MPG Reading on dash
Post by: Ivor Mk4 Turbo on 06 June 2009, 16:58
i will never understand why VW neva put in miles to empty instead of this average crap  :angry:.. gotta get vag tech or something to do it which aint cheap  :sad:


They did!!!...................................................................  Eventually!! :P

You've just got the povvy old one! :D

thats harsh  :sad:... :laugh:
true you should never rely completely on it but its good to have a ruff estimate  :smiley:


He he - So have I!! :D

TBH, mate, you don't want be running on the dregs of the tank - All the crap from the bottom of the tank gets sucked up!

Have you tried the mileage trip instead each time you fill up to see how many miles you get from the tank?

p.s.  When the petrol light comes on, there is 7 litres of fuel left. ;)
Title: Re: MPG Reading on dash
Post by: richards golf on 06 June 2009, 18:16
that was the only way i could tell how much fuel was in my old beemer as the petrol gauge didnt work
Title: Re: MPG Reading on dash
Post by: Ant1981 on 06 June 2009, 18:36
yh but you dont need to know the other reading which changes from 7 - 200!!!!!!! depending on your throttle reponse  :undecided: :laugh:

You don't need anything, but it's nice to have it.
Title: Re: MPG Reading on dash
Post by: navmk4gti on 06 June 2009, 18:49
can you do milege trip using the VAG tech cable??? i need purchase that cable asap  :sad:

been drivin on reserve a lot lately  :embarassed:
Title: Re: MPG Reading on dash
Post by: Ivor Mk4 Turbo on 06 June 2009, 19:31
can you do milege trip using the VAG tech cable??? i need purchase that cable asap  :sad:

been drivin on reserve a lot lately  :embarassed:


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