MPG really low, is this normal??

Billypee · Post by **Billypee** » Mon Mar 21, 2016 11:46 am

Hi,
I have a Scirocco GT and have had it for a couple months now (2nd hand), its been fully serviced etc but i have had one issue since the day i bought it. the MPG is really low, its around 25MPG i do motorway driving every other week but other than that its town driving. even though i do town driving shouldn't it be higher than 25? I know people will say that it depends on driving etc but it shouldn't affect the MPG to be that low, i was thinking of taking it to VW to do a diagnostics testing but that will cost around £70 for the first hour

Could someone help or advice?

nonibanacu · Post by **nonibanacu** » Mon Mar 21, 2016 12:06 pm

That is a fair average for the 2.0 tsi engine. It's perfectly normal

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nonibanacu · Post by **nonibanacu** » Mon Mar 21, 2016 12:08 pm

My average overall (motorways, town, everything for the past 30.000 km is 10l/100 km. That is 24 MPG

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CandyCupcake · Post by **CandyCupcake** » Mon Mar 21, 2016 12:19 pm

Is it TSI or TDI? I had the 177 TDI GT and I was getting 42mpg, and that was with mainly town driving with the occasional motorway driving. I don't drive economically either!

Billypee · Post by **Billypee** » Mon Mar 21, 2016 12:30 pm

nonibanacu wrote:That is a fair average for the 2.0 tsi engine. It's perfectly normal

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nonibanacu wrote:My average overall (motorways, town, everything for the past 30.000 km is 10l/100 km. That is 24 MPG

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I thought i was just over evving my car or there was some sort of leak, thought the mpg of the car was something like 50

Billypee · Post by **Billypee** » Mon Mar 21, 2016 12:32 pm

CandyCupcake wrote:Is it TSI or TDI? I had the 177 TDI GT and I was getting 42mpg, and that was with mainly town driving with the occasional motorway driving. I don't drive economically either!

its a TDI, 42 MPG is pretty good. I want my MPG to go higher!!!

nonibanacu · Post by **nonibanacu** » Mon Mar 21, 2016 12:32 pm

For the diesel 2.0 engine probably you get around 30-40% more mileage with a full tank.

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CandyCupcake · Post by **CandyCupcake** » Mon Mar 21, 2016 12:35 pm

The first 2 replies were in relation to TSI engines which are less economical. I would definitely say you should be achieving more MPG than what you are, unless you race to every set of lights

Billypee · Post by **Billypee** » Mon Mar 21, 2016 12:41 pm

CandyCupcake wrote:The first 2 replies were in relation to TSI engines which are less economical. I would definitely say you should be achieving more MPG than what you are, unless you race to every set of lights

I maybe did when i first got my car but rarely put my foot down, mainly because of pot holes etc. Should i go for a diagnostic test or is there anything else i could do?

CandyCupcake · Post by **CandyCupcake** » Mon Mar 21, 2016 12:45 pm

In regards to pin pointing if there is an issue, unfortunately I can't help there but I'm sure one of the other guys who has more experience will be able to offer some advice! Are you using a good quality fuel?

mackie01 · Post by **mackie01** » Mon Mar 21, 2016 12:55 pm

I have a 170 diesel and I get high 40's and low 50's that's a mixture of roads and sensible driving. The lowest I've ever had it is about 35, if I was getting 25 I would get the diagnosis done. I'm sure the price you pay for diagnostics in VW is not by the hour, they had my car all day before and I only got charged about £64 or something

Cuprabob · Post by **Cuprabob** » Mon Mar 21, 2016 12:57 pm

I would agree it's very low for a diesel. I get 40 odd around town and 50 - 60 odd on a run.

However, if you were constantly doing short journeys, less than 5 miles, the car would never get up to optimum temperature and you would get those type of figures. Diesels take a bit longer to heat up especially if they are stuck in traffic from the outset of the journey.

It's worth gettimg it checked as you could have a faulty MAF or coolant temperature sensor. Issues like this are notoriously difficult to track down without doing fueling logs on VCDS.

Billypee · Post by **Billypee** » Mon Mar 21, 2016 1:47 pm

CandyCupcake wrote:In regards to pin pointing if there is an issue, unfortunately I can't help there but I'm sure one of the other guys who has more experience will be able to offer some advice! Are you using a good quality fuel?

I always use shell, but never the v power

Billypee · Post by **Billypee** » Mon Mar 21, 2016 1:53 pm

mackie01 wrote:I have a 170 diesel and I get high 40's and low 50's that's a mixture of roads and sensible driving. The lowest I've ever had it is about 35, if I was getting 25 I would get the diagnosis done. I'm sure the price you pay for diagnostics in VW is not by the hour, they had my car all day before and I only got charged about £64 or something

its definitely by the hour, its £69 for the first hour and then £83 +vat after. i know its a bit pricey but id rather get peace of mind and finding out nothing is wrong with my car than shelling out loads of fuel

Billypee · Post by **Billypee** » Mon Mar 21, 2016 1:56 pm

Cuprabob wrote:I would agree it's very low for a diesel. I get 40 odd around town and 50 - 60 odd on a run.

However, if you were constantly doing short journeys, less than 5 miles, the car would never get up to optimum temperature and you would get those type of figures. Diesels take a bit longer to heat up especially if they are stuck in traffic from the outset of the journey.

It's worth gettimg it checked as you could have a faulty MAF or coolant temperature sensor. Issues like this are notoriously difficult to track down without doing fueling logs on VCDS.

Ive done an average of me driving motorway journeys and town driving, ive done 2000 miles in 2 months and the average is coming at 24-25MPG, ill get it diagnosed and go from there

Cuprabob · Post by **Cuprabob** » Mon Mar 21, 2016 2:04 pm

Billypee wrote:
Cuprabob wrote:I would agree it's very low for a diesel. I get 40 odd around town and 50 - 60 odd on a run.

However, if you were constantly doing short journeys, less than 5 miles, the car would never get up to optimum temperature and you would get those type of figures. Diesels take a bit longer to heat up especially if they are stuck in traffic from the outset of the journey.

It's worth gettimg it checked as you could have a faulty MAF or coolant temperature sensor. Issues like this are notoriously difficult to track down without doing fueling logs on VCDS.
Ive done an average of me driving motorway journeys and town driving, ive done 2000 miles in 2 months and the average is coming at 24-25MPG, ill get it diagnosed and go from there

Something must be wrong because I would average more than that in my R32. Good luck

SteZ4 · Post by **SteZ4** » Mon Mar 21, 2016 4:08 pm

I drove 150 miles last week with a mixture of A-Roads, Motorways and town traffic at rush hour, and averaged 60mpg with a 170tdi.

Roy_01 · Post by **Roy_01** » Mon Mar 21, 2016 6:31 pm

SteZ4 wrote:I drove 150 miles last week with a mixture of A-Roads, Motorways and town traffic at rush hour, and averaged 60mpg with a 170tdi.

Calculated by the mfd or real milage and replenshing? Im not getting it higher then 47 mpg. But it's a dsg. Or maybe i have to try harder lol.
But on topic: I would first run a fault code scan and then check the injected fuel quantity by each injector with vcds and if there is a big deviations between them.
And you can also check the injection duration and starting point of the injection. But that data is harder to say something about or you have to compare it with someone else.
25 mpg is way to low.

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