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Author Topic: Instrument accuracy  (Read 6481 times)

Offline Rolfe

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Instrument accuracy
« on: 13 October 2009, 00:12 »
When I fill the GTi up, the range display seems to think I've got about 420 miles there.  After 100 miles or so it starts to reconsider, until by 200 miles it's more like 380.  I might actually get 360 before I have to visit the petrol station.  Does my driving continually disappoint, or what?

When I picked the car up the clock was 4 minutes fast.  Soon, it was more like 5 minutes.  I set it bang on to the second with the Radio 4 pips.  It's already a minute fast again.

Not impressed, VW.   :sad:

Rolfe.
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Offline FroGTI

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Re: Instrument accuracy
« Reply #1 on: 13 October 2009, 06:18 »
Just as time slows the further away from the Earth you travel, petrol gauges become less accurate as you move north of the border :smiley:
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Offline Rhyso

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Re: Instrument accuracy
« Reply #2 on: 13 October 2009, 07:58 »
Your computer is constantly re-calculating the range based on your driving style.

You will have a long term average computer which resets after 99 hours and 59 minutes of driving.  It monitors average speed, distance, time spent travelling and average MPG

Its these figures your fuel range is calculated from  :nerd:
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Offline R32UK

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Re: Instrument accuracy
« Reply #3 on: 13 October 2009, 07:59 »
My old car used to tell me 350 mile range everytime i filled up.... lucky to get 250! :laugh:

Been driving now for 10miles and my range says "-". Wonder how far I can get before im really out of juice :lipsrsealed: :laugh:
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Offline FroGTI

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Re: Instrument accuracy
« Reply #4 on: 13 October 2009, 08:10 »
What makes me smile is how the Instant Fuel Consumption setting switches from miles per gallon to gallons per hour as you pull up to a dead stop - typical German efficiency :grin:
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Offline matchboy

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Re: Instrument accuracy
« Reply #5 on: 13 October 2009, 09:24 »
Quote from: Rolfe on 13 October 2009, 00:12
When I fill the GTi up, the range display seems to think I've got about 420 miles there.  After 100 miles or so it starts to reconsider, until by 200 miles it's more like 380.  I might actually get 360 before I have to visit the petrol station.  Does my driving continually disappoint, or what?

When I picked the car up the clock was 4 minutes fast.  Soon, it was more like 5 minutes.  I set it bang on to the second with the Radio 4 pips.  It's already a minute fast again.

Not impressed, VW.   :sad:

Rolfe.

the mk5 instrument wasn't very good either - if you're driving conservatively it goes up, as soon as you put your foot down you lose 30 miles!  i'm v impressed you've got it over 400 though, best i've managed is 350!  for about 5 mins  :grin:
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Offline Rolfe

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Re: Instrument accuracy
« Reply #6 on: 13 October 2009, 10:05 »
It seems to think I'm going to get over 400 miles when I first fill up, and it holds this prediction for close to half the tank, then it gradually gets more and more pessimistic.

I wonder if, initially, it's programmed with this unrealistic 38mpg average that's advertised for the car, and only gradually realises this isn't happening?

Anybody out there think they can get 38mpg average over a tankful of petrol?

Rolfe.
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Offline matchboy

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Re: Instrument accuracy
« Reply #7 on: 13 October 2009, 10:08 »
not as yet after 1500 miles - best i can get is 31!!  :angry:  :laugh:
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Previous: Mk 3 Audi TTS, Porsche 981 Cayman S, Mk 7 Golf R, Mk 7 GTI, Mk 6 GTI, Mk 5 GTI and so on....

shrocco

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Re: Instrument accuracy
« Reply #8 on: 13 October 2009, 10:28 »
Quote from: FroGTI on 13 October 2009, 08:10
What makes me smile is how the Instant Fuel Consumption setting switches from miles per gallon to gallons per hour as you pull up to a dead stop - typical German efficiency :grin:

the first vauxhall vectras do this - it's nothing fancy.
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Offline FamilyDub

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Re: Instrument accuracy
« Reply #9 on: 13 October 2009, 10:59 »
Quote from: Rolfe on 13 October 2009, 10:05
Anybody out there think they can get 38mpg average over a tankful...?

No, unless your route, driving style, maintenence and traffic conditions are all perfect it's a load of tosh... in my humble opinion.

Over the last three years, I'm always about 5-6mpg down on the official combined figure.

FIAT GPS - Official 49.8; Actual 43.2
Golf GTi - Official 35.5; Actual 29.7

Don't flame me over a couple of tenths MPG, can't be ar$ed looking it up, but you get the jist.
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