How accurate is the fuel guage?

[wantmygti]

I've used OBDEleven to turn on the 'refuel amount' option in the dash display - be interesting to see how closely this predicts how much fuel it will take at the pump.

[JoeGTI]

No its only 50l in the R too but I have gotten 51-52 into it from empty... presumably there's room for a tad more in the pipe / reserve.

That is not what it says in the brochure or the manual.

[Daz Auto]

I that a European spec car?

This is the UK brochure -

http://www.volkswagen.co.uk/assets/common/pdf/brochures/golf-vii-pa-brochure.pdf

Page 63 - R 2.0 ltr TSI 310 PS 4MOTION - Fuel tank capacity, galls/ltrs 12/55

Owners Manual, page 326 - "Capacity of fuel tank - Petrol Engine - Four-wheel drive:approx 55l, of whick 8 l reserve."

Sorry I cant be bothered working out how to post screenshots or photos.

[JoeGTI]

It's a screenshot from the Irish product guide.
We all know how unreliable brochures and the likes are. I must check my service book / manual, I'm sure that should have the accurate number.
Either way, even with 0 kms range left in the tank I've never got more than 52l into it.

[Daz Auto]

A few more thoughts on this -

On my Mk6 GTD the 8L reserve sounds right. The car did roughly 10 miles per litre. 50 miles remaining + 30 miles on empty.

I just had a look at the Audi manual for the A3. It has a 50L tank but a 7L reserve. This is good to know as I was telling my wife she had another 30 miles left, like my GTD, after 0 miles remaining The car is more economical but I think 20 miles on empty should be the limit

So as you can see in the examples above. Both cars indicate '0 miles remaining' with a few litres of the reserve remaining.

My GTI Performance indicated '0 miles remaining' just a few miles from the petrol station.

Either there is no reserve left and '0 miles remaining' means just that.

Or there is a few more litres in the tank meaning it is actually has to be a 55L tank.

I'm confused.

[Daz Auto]

It's a screenshot from the Irish product guide.
We all know how unreliable brochures and the likes are. I must check my service book / manual, I'm sure that should have the accurate number.

Yeah, the brochure is wrong about the width of the 19 inch GTI tyres. IIRC they are 225 and not 235 as the brochure states.

Edit: changed the above to state 19 inch GTI tyres.

[JoeGTI]

It's a screenshot from the Irish product guide.
We all know how unreliable brochures and the likes are. I must check my service book / manual, I'm sure that should have the accurate number.

Yeah, the brochure is wrong about the width of the 19 inch tyres. IIRC they are 225 and not 235 as the brochure states.

The R's 19's come with 235's whereas for some reason a GTI on 19's are on 225's meaning that the side profile on GTI 19' tyres are a bit lower than those on the R.

[Daz Auto]

Another thought - if the GTI does 7 miles per litre, 35/7 = 5L. I'm starting to think I may have an 8L reserve and another 3L or around 20 miles in a 55L tank + pipe.

Not sure how I would test this without the possibility of running out of fuel. Which I really don't want to do.

[mcmaddy]

All mk 7s have a 50litre fuel tank period! Mk6 and 5s had a 55 litre tank. The reduction in size is down to the mk7 being more fuel efficient so VW felt a smaller tank would save weight. You've got your tank, a reserve tank and also the length of the fuel filler pipe.

[JoeGTI]

I stand corrected. My manual (MK7 R) states that all petrol/diesel MK7 Golfs have a 50L tank but the 4WD variants (i.e. the R) has a 55L.
This is assuming the manual is any more accurate than their brochures of course.