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Poor fuel consumption.

SRGTD

Active Member
May 26, 2014
1,062
452
i don't think the £10 fill ups are a very accurate way of measuring mpg's - whats your long term figure on the 'puter ?

I'd try some full tank figures to get a more accurate figure.

I recently changed from a 184 to a GTD. Both do 500 miles to a 45l fill up. That's pretty much bang on a real 50mpg. Both manuals, I've heard the DSG loses you a few mpg's.
Agree, £10 fill-ups aren’t the best way to measure fuel consumption. Also, the car’s fuel computer won’t be 100% accurate. Filling the tank, refilling when it gets to somewhere between 1/4 full and empty and then calculating the consumption manually will give a better indication of the true fuel consumption, especially if done over 3-4 tank fulls of fuel.

Just nipping around my local town, about 12 miles on motorway, rest just nipping about.
@Andy184; if your you’re running a diesel in mainly town / city driving conditions for short distances, you’ll be getting quite a few DPF regenerations - engine fan running and higher engine revs at idle being the tell tale signs. DPF’s will have a negative impact on your fuel consumption as the regeneration process uses extra fuel. Brand of tyres can also have a bearing on fuel consumption. I see that Hankook Ventus V12 Evo and V12 Evo 2 have an ‘E’ fuel efficiency rating. By way of comparison, Michelin PS4’s and Continental Sport Contact 5’s both have a ‘C’ fuel efficiency rating.

Is the fuel consumption in the picture you’ve posted at the start of this thread representative of what you’ve always been getting or has it suddenly deteriorated? If the latter, has your journey type or time of day you travel changed, or are different drivers using your car that could explain an mpg change? Have you only recently had the Hankook Ventus tyres fitted? If so, what brand of tyres did you have previously?

In your position, I’d fill the fuel tank to the brim and find a reason to take the car on some longer journeys to see how the fuel consumption changes (hopefully improves!) on longer journeys.
 
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Scotty

Active Member
Feb 10, 2019
88
64
North Wales
Having driven a 184 for three years i'd say my average was about 45-47 mpg, spirited driving in the early hours of
the morning on the N.Wales coast road 35-40,on that headache called the M6 doing 50mph is the only time it got over 50mpg, not bad for the performance available imo
 

BoomerBoom

Active Member
Jun 1, 2018
393
135
I was goin to get a cupra 280 mk3 pfl but mrs demanded we got a economical car so went for diesel for long journeys to coast or what ever, but we do so much town driving:( would of been cheaper to get the cupra. :(

People are telling me this isnt right mpg compared to theres
For town driving you're better off owning a nissan leaf, you'd be lucky to get 25mpg in a cupra.
 

The Daily Meme

Insta: @thatredcupra
Jan 3, 2018
894
450
Cambridge
I have the 184 petrol equivalent and will get 45 mpg on my way to work. When the traffic is clear I can sometimes push it above 50 mpg. It is a manual and that's 40 miles on mostly A roads.
 

kazand

Is powered by Medtronics
Jun 6, 2010
4,154
67
Brum
My work 150 Passat does around 800 miles to the tank on my normal runs ( Leeds, Manchester, Glasgow etc) but if t'wife uses it on her weekly commute it drops to as little as 400. With the Cupra she averages 290-300 to a tank.
 

Andy184

Active Member
Jul 6, 2019
43
5
Bad fuel since putting 18s on with these ventus tyres, before I would see more miles. Yeh short journeys are going to kill my dpf.

Ive never got more than 450 to a tank but yeh, recently the 20 and 30 quid fill ups are seeing alot less miles. :(
 

JonnyG

Active Member
Mar 18, 2019
59
30
I'd be happy with 45mpg if you do a fair bit of town driving. Our Golf GTD averaged 37mpg over its lifetime doing mainly 6 mile commuting. On a long run it would get around 48mpg.
 

Shaady

Active Member
Jan 25, 2017
162
26
Your MPG for doing mainly town driving sounds about right, if you wanted good MPG in town a small petrol or even electric would have been a much better choice.

It is going to kill the DPF too, don't be surprised if you have to cough up for a replacement in the not to distant future as it will just get too clogged and the standard regen cycle won't be able to clear it.

Granted at the moment I sit in average speed check zones to and from work but its mainly motorway and quite fast A roads and there it not a day that I don't see 55mpg, most days its closer to 60 so there is definitely a use case for diesel, town driving just isnt it
 
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KXL

KXL
Dec 15, 2016
1,427
153
London, UK
I used to have a 2.0TDI 150 DSG, and that would do about 45mpg average in 'mixed' city and some extra urban. I've once (on a full tank of Shell Diesel) on motorway run, did just under 600 miles before the red light came on. It was doing about 57mpg the entire tank. On motorways was sat at 70-75mph cruise. London City in I would get anywhere from 35-45mpg. This is weekend or evening weekday driving. If you know your engine will be idling for at least 30 secs guranteed (eg...u stop as light has turned red in front of you and you need to stop), just let the startstop do it's thing. When it's doing a DPF regen, it won't start-stop anyway, and you can see your average mpg plunge right before your eyes! The others are right, a fully clogged DPF is very expensive to replace. Diesels are not suitable for cities unless u drive all day around the city. Has yoru DPF light come on yet? You should either do a long journey (at least 1hr @ motorway speeds 70mph (rpms must be above 2000)) before the light comes on, else suggest DPF cleaning services like https://www.terraclean.co.uk/. Once the light comes on (I believe) it's 90% clogged and almost at the point of no return.
 
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MH0

Active Member
Aug 7, 2019
37
6
For town driving you're better off owning a nissan leaf, you'd be lucky to get 25mpg in a cupra.
I can agree with you there:cartman:. I'm lucky to get 200 miles from a full tank on my cupra. Driving in London and in rush hour is not a good mix at all.:banghead:
 

andycupra

status subject to change
so, you are getting 40mpg, you also state you are doing lots of miles but all in the town on short journeys..
on this basis 40 mpg is about as good as you can get.
and at 40mpg you should be getting about 67 out of £10 - based on 130p per litre = 7.69 litres or 1.69 gallons.
Of course, you will not get 67 miles before light comes on unless you previously topped up at the exact time the light came on. (otherwise it will be miles achieved before light comes on, plus miles travelled after light came on previously and before you added fuel).

comparing yourself to others is only applicable if you drive the same car, same engine, same speed, same driving style and same conditions. If you are driving shorter journeys in stop start traffic around town, but the comparison car does the same miles but in few journeys on B/A roads or motorways you will always be worse.

You are also viewing miles since filling up... so assuming you drive to the petrol station, then fill up you are potentially looking at mpg achieved on a warmed up engine and not including the first few miles on a cold engine achieving lower MPG.
this is also why people often look at the mpg they are getting towards the end of a jouney, and see the range indicated and wonder why they don't achieve this. The range in particular will be based on the 'recent' mpg achieved, so if you view later in a journey it will look good as it will exclude the cold start up mpg. Take a look at the range when you are in the first couple of miles, it will be lower than before and could then actually increase as you get later in the journey.

averaging around 23mpg with a long time to achieve the miles indicated in the pics, this indicates a pattern of driving which will never give great mpg - i think you are doing pretty well to get the mpg indicated.
the way you use the car, a petrol engine may actually be better suited.
 
Last edited:
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garybuttle

Active Member
Oct 27, 2011
130
2
We have a 150 TDI and wife got this coming home from work a 30 mile journey back roads ,A roads and duel carriageway .
Average over 64000 mils just under 60 mpg


Sent from my moto g(7) plus using Tapatalk
 

seventen710

Active Member
Jul 18, 2012
106
5
Emsworth, Hampshire
My 184 ST DSG has pretty terrible fuel economy. Rarely get much over 45mpg, or more than about 450 miles per tank. Been like this for the three years I've owned it.
 

paulrushton

Active Member
Apr 5, 2009
56
0
I fill mine up whenever I refuel and use Road Trip to record actual mpg. I find the computer is a little optimistic.

Over 6768 miles mine has averaged 41.4mpg. Mines an X-perience model so 4 wheel drive (occasionally) but happy with that.
 

RUM4MO

Active Member
Jun 4, 2008
6,241
446
South Scotland
DSG uses a lot more fuel than the equivalent manual.
I tend to agree with you, well for the average>competent driver in each car, the whole consumption test regime was altered quite a few years ago to "assist" any/all automatic/robotisied gearboxes probably because the trend was towards auto trans to make life easier for engine design.
 

KXL

KXL
Dec 15, 2016
1,427
153
London, UK
We have a 150 TDI and wife got this coming home from work a 30 mile journey back roads ,A roads and duel carriageway .
Average over 64000 mils just under 60 mpg


Sent from my moto g(7) plus using Tapatalk
Is that a 6 speed manual? The best I've ever achieved in my 63 plate 2.0TDI 150 DSG was 64mpg. It only made it to 10k miles before it was returned though.
 
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