Average MPG - Longterm - GTI

[Moro]

Currently sitting at 34.8 after 660 miles - according to the car.

Interestingly, this seems to be a much more accurate representation than I have had on previous VAG products, which have always recorded an 8% - 10% optimistic number compared to my fuel calculations.

[GolfTi]

You could have something here.

My mpg after 7k is 36mpg, only slighty better than the mk6 when sold.

However the tank is 5 litres smaller and I seem to get more miles per tank than the mk6...

[andygou]

Several interesting observations about fuel computer accuracy on here. Has anyone done definitive comparisons between the figure shown on the computer and actual brim-to-brim calculations over a reasonable period?

10% optimistic computer error like my present A3 can make some of the figures reported here look much more (or less!) acceptable!

[monkeyhanger]

The MK7 MFD does seem more like 4 - 5% optimistic rather than 9 - 10% of previous VWs.

[andygou]

Thanks monkey hanger, wonder if VAG have given up on trying to pull the wool over people's eyes on fuel consumption.
I can see no reason why the computer shouldn't be pretty much accurate, given that they actually get their info from the engine management system rather than relying on a flow meter as of old.

[GolfTi]

OK, just filled up.
Computer average since last fill = 35.3
Calculated using brim to brim = 36.15

Covered 389.7 miles and used 49.0 litres. So unless I'm calculating this incorrectly the car is actually showing a lower mpg than the actual....
7K + on the clock

My mk 6 was consistently showing 6-7% above actual.

Need a few more fill ups and will take the average but this seems to agree with my intial thought, smaller tank than the mk6 but more miles per tank.
btw The petrol tank must be larger than 50 litres as I put 49 litres in and it was still showing 25 miles range.

[Sootchucker]

Your calcs are spot on.

I noticed this as well with my GTD, typically it's only 0.5-1.5mpg optimistic from the brim to brim, and taking into account that even brim to brim has a deviation of inaccuracy (forecourt delivery accuracy, temperature, filling to exact same point each time etc), then it's much more accurate than my older Scirocco which was about 17% inaccurate (before I tweaked it in VCDS).

[2014GTi]

So what are your thoughts guy?
The cars don't have bad mpg after all?
I'm hoping for 40mpg+ on my commute to work, 45 miles.
75 % motorways and 25% 30/40mph zones.

[matchboy]

I think its boils down to the way you drive; if you're Miss Daisy you'll attain those figures after around 10k miles.  If you prefer a more exciting, heavier foot approach you won't! 

[Moro]

After 900 miles, the computer seems quite accurate. 36.4 on the computer, 36.1 by fuel bought. I'm assuming the odometer to be accurate...

This is much more accurate than on my previous cars. Best I've seen so far has been 40.2 on a 220 mile return trip doing the speed limit where possible (motorway, trunk road but little town) and generally driving sensibly - so I'm happy with this, as 40mpg may be regularly possible as car loosens up.