Author Topic: Instrument accuracy  (Read 6469 times)

Offline Radek

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Re: Instrument accuracy
« Reply #10 on: 13 October 2009, 12:15 »
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.

2 things:
1. The official combined figure was never intended for a full tank of petrol! As the name says it's a test combining 4 urban cycles and 1 extra-urban over 1200 secs. It's only used for comparison and vehicle approval.
2. I can get 39.8 mpg driving to work when I stick to the speed limits on the A road and don't overtake too many times... That's 21 miles trip with a little bit of everything - country roads, the mentioned A-road, a couple of towns with 30-miles limit. Rather boring but still possible.

The combined figure from new including some more lively parts is 31 mpg.
Golf GTI VI DSG - died on the road, resurrected, came back as zombi, sold
R - rising blue, 5-door, DSG, ACC, something something...

Offline GolfTi

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Re: Instrument accuracy
« Reply #11 on: 13 October 2009, 12:31 »
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:

Mine doesn't do this. Max is 200mpg then '---'.


Highest mpg so far is 44mpg on a 12 mile 40/50mph run with few stops. Most i got from the mk5 on the same route was 40mpg(on 99 RON) so this confirms the advertised 10% increase in fuel economy.

Average after 600 miles is 32mpg.

Oh and the clock is spot on after 3 weeks.
« Last Edit: 13 October 2009, 12:33 by GolfTi »
Mk7 GTI. DBP, DCC, Winter pack. Mine since new, July 2013.
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Offline FroGTI

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Re: Instrument accuracy
« Reply #12 on: 13 October 2009, 12:52 »
Mine doesn't do this. Max is 200mpg then '---'.

Maybe it only does it when you have it on the Continental display like I do (litres per 100km >> litres per hour)?

Offline R32UK

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Re: Instrument accuracy
« Reply #13 on: 13 October 2009, 13:52 »
i had 41mpg over a long distance journey.

450miles from a full tank... approx :wink:

Offline mac7

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Re: Instrument accuracy
« Reply #14 on: 13 October 2009, 17:38 »
i had 41mpg over a long distance journey.

450miles from a full tank... approx :wink:

Hope you made up for that by giving it a good throttle-wide-open thrashing for a few hours.
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Offline R32UK

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Re: Instrument accuracy
« Reply #15 on: 13 October 2009, 17:48 »
i had 41mpg over a long distance journey.

450miles from a full tank... approx :wink:

Hope you made up for that by giving it a good throttle-wide-open thrashing for a few hours.

That was a running in period :wink:

gets a good spanking everytime now :evil: although no more 30+mpg :undecided:

Offline keelaw

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Re: Instrument accuracy
« Reply #16 on: 13 October 2009, 20:18 »
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.


Rolfe - that'll be because you're using up the fuel in the tank....  :laugh: :laugh: :laugh:


Mk6 Golf GTI 5dr, DBP, Monza Shadow, Xenons, ACC, RCD510, Park Assist, Camera, Lux pack.... and now bluetooth.... and now DSG!


Offline Rolfe

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Re: Instrument accuracy
« Reply #17 on: 13 October 2009, 20:33 »
Get with the programme!  I reset the trip meter to zero when I fill up, and add up.

:rolleyes:  :rolleyes:  :rolleyes:

Rolfe.

Offline DDRFan

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Re: Instrument accuracy
« Reply #18 on: 17 October 2009, 23:59 »
...
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.
This seems to happen in the Yaris I drive at the moment. It seems to be about a minute every couple of months or something. I don't mind it too much because with any timepiece there is always a slight inaccuracy
I'm thankful that the clock goes *faster* than actual time rather than *slower* - at least if I'm driving somewhere for an appointment or to meet somebody and I imagine the car's clock to be the real time, there is always a minute or so spare.

I have a bad habit with time keeping; most journeys i never follow the good advice to set off in good time in case of bad traffic.

perhaps an interesting sidenote to this is that i wear a Casio Wave Ceptor watch.
http://www.casio.co.uk/products/Watches/Wave%20Ceptor/
http://waveceptor.casio.com/

my particular one is also solar powered (charges an internal battery so i can use it when i'm a vampire) - i've had it for about 3 years, i've not had to change the battery or ever correct the time, it updates from GMT to BST by itself.

I understand timepieces that update themselves in this fashion are deemed 'radio-controlled'
http://en.wikipedia.org/wiki/Radio_clock
http://www.radioandtelly.co.uk/rctime.html

it would be a nice touch if manufacturers started adding this to cars (assuming they don't do this already) meaning that a clock would never be more than a second inaccurate in a 24hr period.

Offline ub7rm

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Re: Instrument accuracy
« Reply #19 on: 18 October 2009, 11:56 »
^^

Its surprising the VW's don't have this feature.  Vauxhalls for one have had radio controlled clocks for a long time, I believe they use the RDS radio data to determine the correct time  :undecided:
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