Fuel Consumption - How's THAT going ?

[J Dawg]

GTI owner here, just past 1800kms.

I got 7.5l/100km from the 3rd tank - this is with some fairly energetic driving off the line whenever I can. I do use cruise control as early as I can - even at 60km/h, and brake early for the lights and coast to a stop when I can.

I should also mention - I have the DSG, but almost 95% of the time, use it in manual mode. I don't use the start-stop function.

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[adnrw]

We have had our 90TSi Comfortline for about four months and have driven around 4,500kms (it's lovely!).

We hover around 8-9L/100km on a normal week: we drive ~15-20km every weekday in peak hour traffic at an average speed of ~20-30km/h.

We were away over the holidays doing mostly 10km+ highway driving with a bit of side-street driving too and ended up around 5.5L/100km, average speed of around 60-70km/h.

A few weeks ago I had to drive ~100km (almost entirely highway) each way to and from work for a few days and was getting bang on 5L/100km each trip with an average speed of 85-90km/h.

In general we get around 600-800kms from a full tank.

[Diesel_vert]

I am interested to see if anyone has tested out how much farther they are able to travel on a tank of fuel with the auto stop/start system on vs off for a whole tank at a time. Although there are fuel savings to be had, it has its quirks with regards to responsiveness in stop/start traffic (yes I have been following the other stop/start thread).

If anyone is also curious/happy to do this experiment while outlining their usual driving style/traffic, it would really help in determining if this system is as effective in real life.

Therefore those who are less reluctant to use the auto stop/start system can say I'm happy to forgo xxkm/tank or xxL/100km, especially if the difference is not that great.
I would do this experiment myself but I'm 4 months away from having my car delivered!

It would obviously depend on the driving conditions, but in terms of raw figures, I couldn't say.


This is what The Motor Report wrote:

When approaching traffic lights, careful judgement was applied to the timing of the lights.

If a short stop was anticipated, we coasted; but if it looked like a long stop, arriving relatively quickly to utilise the benefits of the start/stop system seemed a logical strategy.

Volkswagen claims that the engine needs to be off for at least 15 seconds for this system to be of any efficiency benefit.

Source: 2012 Volkswagen 'Think Blue' Fuel Economy Challenge


So if the journey includes frequent and long stationary periods, the more beneficial the system becomes. On the other hand, someone that drove exclusively on the highway would find the system of little benefit.

[Jondalar]

We just got our 110 TDI last week, took it for a hwy run and were pleasantly surprised to see consumption down to 4.9L/100, this on a car with only 200km on the clock. My wife has been getting 5-5.2 for her run for work which is 35km about half of which is highway but even that is often stop start.

[Sammy125TDi]

3000km on my GTI with DSG. Spends most of its time in ECO mode with mostly city driving and the odd highway run. Have done a few spirited national park runs.

Long term. 8.9L/100km av speed 38km/h

[kure69]

3200km on the clock on my 90tsi.

Recently did a few trips from Melbourne to Geelong Lorne. 4.7l/100km with aveg speed 80km. 4 people in the car, boot full gear and aircon on and about 38deg out side. With out the air con on it will drop even further to about 4.5 easy.

What can I say, every happy for petrol engine to be getting these results.

[AdamD]

3000km on my GTI with DSG. Spends most of its time in ECO mode with mostly city driving and the odd highway run. Have done a few spirited national park runs.

Sammy, did you sell (part out?) your Mk6? Decided to go DSG this time?

[Baz 55]

Just a follow up on the original post.
Fuel consumption after 4000km hasn't changed much.
Comfortline 90 TSI with DSG in Economy mode (just about always) coasting a lot where practical.
Mostly outer urban driving. 1 person on board with beloved golf clubs
Long term average 5.2l per 100km Some tanks were 5l per 100km

[scobb]

Finally, 2 months after I took delivery of my 103kW TSI Highline, it was time for some fuel. The car has had a very quiet start to its life, covering just 614KMs in those 2 months, all of which were in reasonably heavy urban traffic. Fuel economy was 8.4L per 100KM.

Curiously, I thought the tank capacity was 50L? I still had 35KM range showing at the point of refuelling and yet, without really brimming it, I got 51.84L of fuel into it!

[Baz 55]

It's a 55 litre tank I think

[Idle]

Well, the book says 50lt, and I'm not getting as far on a fill as I did with the 55lt Mk6.

[Mountainman]

It's a 55 litre tank I think

Book says approx 50L of which approx 5L is reserve. I have found it easy to fill with 50L when the gauge has just entered the red and there is still between 50km to 80km showing on the range of the MFD.

[scobb]

The reason I'm curious about this is to understand just how low I had run the car. Was it running on fumes or maybe it still had 5L in it? There must be a definitive answer and I'm guessing that it's not the 50L referred to in the handbook.


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[Mountainman]

I have read somewhere on one of the forums of someone claiming they had put over 56L in theirs and it was still running at the time.

[Brendan_A]

Took the GTI for a drive through the mountains yesterday and did some 480kms. Got down to 5.8L/100km then ended up at 6.5L/100km after we had fun in the mountains. Not bad for having 1700ks on it.