I'm only getting approx 14 mpg from my newly purchased N reg STI version 2, It has decatted exhaust and downpipes and K&N air filter. Its imported and running standard map and ecu.

Can someone please tell me why the mpg is so low, I was expecting at least 20mpg+. I haven't been driving like a lunatic so any suggestions on what could be causing this would helpful????

Thanks
Kev

 

which fuel you using?


to be honest i get 13.4mpg from my not very powerful forester using v-power so count yourself lucky!

 

I'm using Shell V-power, filled up the tank which I think is 45 litres and got approx. 130 miles.

Is there anything that could be causing it to be so low? Sensors, etc?

 

Poss o2 sensor faulty?

https://www.scoobynet.com/general-te...ffect-mpg.html

 

I was just gonna say, check out my post.

I don't mind if you carry on this conversation in my post - may help for future readers?

Just to add tho, check the fault codes yourself by connecting the two black connectors under the steering wheel. Might throw up a code.

I get around 140 - 160 off a full tank mate! Buying a new lambda this weekend! Already had a new engine coolant temp sensor fitted.

 

I'll keep watching your post to see how you get on, before I go out and buy one.

Cheers
Kev

 

Just PM me and ask mate.

Seriously though, check the error codes...

I did and it took like 1 minute to do!

 

i get roughly 150 to a tank thats on a 95 uk with usual mods, its done that for the 2 1/2 years ive had it so its just the norm now.

 

With no mods standard, my car used to do like 250 off a full tank.

Then I had it off road for 3 months. Nothing but problems and money since putting it back on the road.

 

i would be well happy with 250 of one tank.

 

mine normally does 160 to the tank but would be very happy at 250 per tank

 

I'd be happy with 5000

But seriously, that's what I used to get.

Standard car, no mods.

 

strange that i may get a lambda to try or see if i can borrow one to try i have asked loads of people and there nearly all around the 160 ish mark

 

I'm certain i used to get more!

Like, off a tenner at the mintue i'm getting 20ish miles.

That's about 11 - 12 MPG !

Something is definitly wrong.

 

bloody hell mate 20miles to tenner

 

Hence my post about my lambda.

160 miles off say 45 litres is 16mpg, you should be getting more like 20mpg.

 

i get around 250 in my sti which i think is good.

what is your driving style like?

 

when i first got my turbo 2000, i put a full tank in it, and then drove it almost constantly as i loved it so much, an i got around 220-250 miles to it, there was quite alot of playful driving involved too.

 

Welcome to the joys of scooby ownership

 

i must consider myself lucky......

i get 300 off a full tank which is bout 60 litres, on my 2004 wrx

using v-power

''ps. and no i dnt drive like a granny'':-)

 

i get around 200-220 miles to a tank depending on how i drive, its a uk 2000 turbo.

 

im another 20 miles to the £10 scooby owner... final classic shape uk turbo
i dont know maybe somethin is wrong maybe its normal. mind you my 1998 2.0 16valve mondeo does 40 miles to £10 and i have to drive it at high revs to move compared to the impreza.
i am constantlly flooring the impreza when safe to do so and cant help myself when at the front of lights.

 

225/tank - 23-25mpg out of a brickwall lardy Forester.....

Simon

 

https://www.scoobynet.com/scoobynet-...-out-tank.html

 

You should be getting more than that. Normal mixed driving should return above 20 atleast. All the claasics that I have owned (sti 3/4, uk turbo my99) have all returned no less than 20mpg. Quite often i'd be nudging 25mpg and that was very little motorway use.

Get it checked out mate. 14mpg certainly isn't the norm.

 

Its looking likely that I'll achieve approx. 220 from the next tank of petrol so I'm guessing it may have been because the car hadn't been used for a while and also a heavy right foot while I got used to the car.

Thanks for all your replies, at least I know what to check if the mpg drops in future.

Kev