Well , the car finally arrived after a long anticipated wait , although not quite the spec I ordered,I can live with that, as I've got the car I want. 

There is one issue though, does anyone else have a problem with an over optimistic fuel gauge , I just refuelled today and put 41 litres in , but the fuel lgauge was indicating half a tank left ,assuming a 60 litre tank , I would have thought that indicates a quarter of a tank remaining.  I know you can check via the menu , but I just wondered if anyone else had a similar thing. 

Standard tank is 66 litres iirc

Thank you for the info, I just did a google search thingy for tank size , RTFM ,as they say.  

I've put in over 70L after the warning light comes on.

Possibly by filling the space reserved for expansion, going beyond the first click off point with fully inserted filler nozzle, which can be over 5 litres more, but not recommended because of the likelihood of damage to the evap control system which you may also fill with fuel (not good).

 

Some Audis, A6 I think, have options of 75l tanks, maybe some Superbs have got extra large tanks fitted.

 

Being a plastic tank it will probably have a large dimensional tolerance.

Edited 31 December, 20187 yr by xman

Fuel gauges are never linear and you can always seem to get more fuel in than they say.

 

At the end of the day they don't design fuel tanks and level indicators to give you an exact amount of fuel remaining, its to give you a rough idea and to make sure you don't run out more than anything else.

If you have the PR-number/code of "1Z2" (Increase in initial standard fuel filling) in your vehicle specific build data, then you have an extra capacity fuel tank than the standard 65L tank.

Standard is "0M4".

If u also see 1Z2, then u have the bigger tank.

 

1Z2 brings the capacity up to 75L or so.

Edited 1 January, 20197 yr by JR RS

The fuel gauge on the Superb is very non-linear; it doesn't drop at all until a fair bit of fuel has been used, when it reads half-full it's closer to a third full. If you keep the tank topped up and don't work out the numbers, this makes it look like it's got better fuel economy than it actually has...

old tread:

https://www.briskoda.net/forums/topic/408362-fuel-tank-capacity/

On 17/08/2016 at 10:17, MartiniB said:

looks like reserve(1/8 red) area not included into declared capacity ~66

 

then full capacity is ~75 l

66 / 7 * 8 = 75,42857

 

few pictures:

https://www.drive2.com/l/482538820865098054/

Best I've managed to fill with is 70.36 litres. I did once run out completely  and put in 72.38 litres, but there was a whopping 4 miles drivin between the first 5 and the rest.

 

For what its worth, the difference between my MPG calculated by the car and by my spreadsheet is about 0.34 MPG. That's over the course over 2,300 litres and 18,000 miles in the last 11 months.

That's very interesting actually, I did wonder how accurate the display was. I'm jot that worried about MOG, because I've always thought that it needs petro, when it needs petrol. So I don't worry too much about it, but I do like to have a rough idea of how far I can push it , not literally though.  

58 minutes ago, JamesETheFirst said:

That's very interesting actually, I did wonder how accurate the display was. I'm jot that worried about MOG, because I've always thought that it needs petro, when it needs petrol. So I don't worry too much about it, but I do like to have a rough idea of how far I can push it , not literally though.  

Assuming you're getting round 30mpg, you're good for about that once the light comes on.

i drove for another 35km with the fuel light on, and the gauge at the bottom of the red zone.

did 926 km on that tank.

filled up about 76L.

 

it was an expensive fill-up 

Ouch! 

+1. The fuel gauge is absolutely non-linear. I regularly add ~1l (1/4 gal) after the 1st click while refueling. and here are my usual diesel consumptions:

 

Fuel gauge indication - km (ml) with "Mid-heavy" foot - km (ml) with "Light" foot 

1/1 - 100 (65) - 120 (75) (needle remains stuck to 1/1 a loooong time)

1/2 - 450 (280) - 500 (310)

1/8 (fuel light on) - 700 (435) - 830 (515)

Then the remaining autonomy is around 120 km (75)

 

If you have the "Fuel replenishment indication" on your board computer, it is NOT reliable at all, since it delivers fuel quantity to be replenished with 5L (1.25 gal) steps (at least in Metrics).

Last week, after 500 km (310 ml) from previous refueling, it "proudly" indicated me only 20l (5 gal) to replenish .

Since then, I'm thinking about deactivating this indicator...

 

A while back I read an online article attributed to a Ford engineer where he stated it was common practice in the industry to indicate that the first 'half' of the tank bigger than the second 'half' for the feelgood effect on the driver that they were achieving 'better' mpg.

Every car I have owned in the last 20 years pretty much followed this practice, with some individual variation of course. They must think we are all idiots.

Hate those sticky gauges that suddenly plunge.

2 minutes ago, Gerrycan said:

 

Hate those sticky gauges that suddenly plunge.

I noticed this but I never knew that this was done on purpose. 

20 minutes ago, FrankLK said:

I noticed this but I never knew that this was done on purpose. 

The sticky gauge hate was just a personal comment, don't think they engineer in that bit on purpose. No one could be that evil.....could they?

36 minutes ago, Gerrycan said:

The sticky gauge hate was just a personal comment, don't think they engineer in that bit on purpose. No one could be that evil.....could they?

Yes. But the effect is worse on the Superb than any other car I've driven...

36 minutes ago, IanJD said:

Yes. But the effect is worse on the Superb than any other car I've driven...

Well you can thank your lucky stars that you never drove the mk1 Hyundai Santa Fe 2.7L v6 I had the misfortune to own.

The speedo was so optimistic it was barely legal, even the odometer was nearly 8% optimistic (I did not get that fixed as it worked in my favour on mileage claims) and the fuel gauge was obviously adapted from a lift indicator on a 4 story building as it only deigned to drop in quarter tank increments. Consumption was similar to that of a Centurion tank.

Its other faults were too numerous to mention.

Actaully I did drive one for exactly one day when my Sharan VR6 was laid up for weeks with the "VW injector" problem, it was supplied as the replacement car. It was so hideous to drive -- basically, it felt dangerous -- that I insisted on a different vehicle, got a Zafira which was OK. QUite the nastiest vehicle I've ever driven, and that includes minibuses and vans...

The optimistic fuel gauge can can be used to great effect on hire cars. Fill them up the day before you take them back and it will still show full.

I did have a problem with an A3 I hired as it only showed the miles left and in Portugal nearly every station I tried wanted you to pay for the petrol before you put it in. Luckily I found a manned station who put the petrol in and then charged me for it.

 

I have put 70.04, 71.38 and 72.35L. The last one i was running with the fuel light on for 35Km. I put more than 66L almost all time. Here people say that gas stations are stealing, but i use the same 3 gas stations that i was using with my old car, a Toyota Avensis. It had a 60L fuel tank and only once i put 59+L. That time i was running with the fuel light on for 100+ Km with a speed of 100Km/h. So i suppose that Superbs's fuel tank capacity must be around 75L. I will check the codes JR RS mentions.

I’m sure there’s a difference to what the tank capacity is specified as, e.g. 65 litres, and how much you can jam into it before the pump nozzle won’t add any more.

 

Has anyone tried filling to specified capacity, i.e. turn up to the filling station on vapours and a prayer, put 65 litres in and then seen the behaviour of the fuel gauge? 

 

11 hours ago, Ivan8192 said:

I’m sure there’s a difference to what the tank capacity is specified as, e.g. 65 litres, and how much you can jam into it before the pump nozzle won’t add any more. 

 

But not that big difference if you stop when the pump nozzle stops for the 1st time. There wasn't any in my previous car. Not a noticeable one at least.

 

11 hours ago, Ivan8192 said:

Has anyone tried filling to specified capacity, i.e. turn up to the filling station on vapours and a prayer, put 65 litres in and then seen the behaviour of the fuel gauge? 

 

I haven't tried, but a few times that happened to fill 65-67 litres, i noticed that the fuel gauge needle was about in the start of red area before i start filling. That made me think that there is an extra reserve beyond the 66 litres that corresponds to the red area in the fuel gauge. I asked the service guy in my first service and he denied it. He said that 66 litres is the total capacity including the reserve. He couldn't explain how it is possible to fill with 72 litres a tank with a capacity of 66 litres. He said something about inaccurate gas station gauges or stealing, but he admitted that 6 litres plus was too much for either. And when i told him that there were no noticeable difference in my previous car, he just shrugged.

 

In any case my fuel consumption is what i expected so i don't care if the tank is bigger. I consider it a plus.

Edited 9 January, 20197 yr by phph
Problem with quotes