my first full month with the car, filled it up and zero'd the clock. at the end of the month now and clocked up 150 mile and its about to go onto the reserve. i havent been thrashing it. i admit occaisionally i have give the car boot. working out the mpg its done about 15-18mpg which is terrible

brakes are fine
tyre pressures are fine
its just had new plugs and a new pipercross panel filter
no other mods

any ideas ?

 

From what ive heard they are not good on fuel for some reason pal ,dont know why though !

 

pottering around these cars are closer 18mpg and are well known for not being fuel efficient but on longer runs etc you can average out closer to 40mpg, and as soon as you boot it and the flaps open these eat fuel like a range rover

 

but 18 mpg is stupid, my old mans GTO twin turbo 3.0 v6 does that lol

 

Sounds about right, I used to get 21mpg out of mine with normal mixed driving. They are utterly shockingly shite on fuel and has to be the worst performing car to mpg I have ever known. I then bought a mk2 st, even with it tuned to a little over 300bhp it was still more economical than the st170 was.

You could always check the air flow meter and lambda sensors are reading correctly, they are known weak points and can lead to poor mpg if not right.

 

as richie also mentioned they are well known for this, my own 170 drives great and handles like new but dont talk to me about fuel as its crap, joys of owning a 170

 

Second gear is very addictive

I tend to get around 16-22mpg out of mine.

 

I got nearly 350 miles to a full tank before.

 

Pretty much the norm. My Mrs could only get 21/22 mixed driving.
The odd long run helps improve it, just pottering around chokes them up. I've had about 11mpg from it. My st24 was more economical and my L200 sees 32+ so they're piss poor, one of the main factors for us getting rid. We could afford to run it like that but didn't see the point when the Mrs sat in traffic most of her journey. Can run her fart box fiat nearly a month on a weeks fuel in the st170. While it's not quick the chassis is great on the little fiats.

 

I took this pic the other day.

 

these cars need a good rinse every now and then thats for sure as pottering round the shops does them no good, I think I did 344 on a tank so your pic is pretty spot on glenn for normal driving

 

The last time i had a full tank i only managed 300 lol.