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Lowest acceptable mpg on a Coop? #1630280
02/03/2019 11:50
02/03/2019 11:50
Joined: Sep 2008
Posts: 4,462
J
JKD Offline OP
Forum is my job
JKD  Offline OP
Forum is my job
J

Joined: Sep 2008
Posts: 4,462
In your experience, how much effect has a combination of old age and high mileage had on the Coop's mpg?

What's the lowest mpg (in this case, a standard 20VT that's mainly town driving off boost with a bit of boost here and there) one can expect to have to live with, as opposed to an mpg that indicates something is wrong with the car?

Re: Lowest acceptable mpg on a Coop? [Re: JKD] #1630281
02/03/2019 12:17
02/03/2019 12:17
Joined: Dec 2005
Posts: 17,083
Staffordshire
Nigel Offline
Club member 123
Nigel  Offline
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Joined: Dec 2005
Posts: 17,083
Staffordshire
Mileage and age have very little effect - its all down to how well it has been looked after

My Coupe returns an average of about 25mpg, which includes all sorts of driving. That said, its not typical, as the cylinder head work makes it more efficient than a stock Coupe

I would estimate 20 - 25mpg for the type of driving you mention. 25 - 30mpg for more out-of-town driving. As low as 15-20 when really hooning and as much as 35 when cruising on the motorway


[Linked Image]
Re: Lowest acceptable mpg on a Coop? [Re: Nigel] #1630283
02/03/2019 12:31
02/03/2019 12:31
Joined: Sep 2008
Posts: 4,462
J
JKD Offline OP
Forum is my job
JKD  Offline OP
Forum is my job
J

Joined: Sep 2008
Posts: 4,462
Oh dear.

I put in about 8 litres the other day, and the gauge has nearly gone to the bottom - after 18 miles in three days. crazy

I'm not sure if the gauge is just messed up!

I've had it serviced a few months ago and got two injectors changed recently, but the idle seems rough and the car heavy and sluggish apart from when the boost kicks in! Also, when starting the car I find I'm now having to press on the gas to help it fire up!

Re: Lowest acceptable mpg on a Coop? [Re: JKD] #1630292
02/03/2019 19:33
02/03/2019 19:33
Joined: May 2017
Posts: 86
Vinisce
D
Dorian Offline
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Dorian  Offline
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D

Joined: May 2017
Posts: 86
Vinisce
My friend has Bravo 1 1.8 GT with the same issue. Car is hard to start and has bad fuel consumption. I think he fixed it by changing MAF sensor.

Re: Lowest acceptable mpg on a Coop? [Re: JKD] #1630294
02/03/2019 19:38
02/03/2019 19:38
Joined: Aug 2007
Posts: 7,172
Southsea
Gunzi Offline
Club Member 189
Gunzi  Offline
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Forum is my life

Joined: Aug 2007
Posts: 7,172
Southsea
My average city driving was 22mpg.

Re: Lowest acceptable mpg on a Coop? [Re: JKD] #1630296
02/03/2019 19:57
02/03/2019 19:57
Joined: Mar 2007
Posts: 10,592
Auld Reekie
Edinburgh Offline
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Edinburgh  Offline
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I AM a Coop

Joined: Mar 2007
Posts: 10,592
Auld Reekie
My average around the city is 4-4.5 miles per litre, but 7 on a long run - very occasionally 8


[Linked Image]

So there, Photobucket...
Re: Lowest acceptable mpg on a Coop? [Re: Edinburgh] #1630305
02/03/2019 23:23
02/03/2019 23:23
Joined: Dec 2005
Posts: 19,911
North wales
pinin_prestatyn Offline
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pinin_prestatyn  Offline
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Joined: Dec 2005
Posts: 19,911
North wales
My Flea mapped 20VT was far better on juice than my current golf GTI. I was getting an easy 32 MPG if I was caerful around town.



Coopless!
Re: Lowest acceptable mpg on a Coop? [Re: pinin_prestatyn] #1630350
04/03/2019 10:37
04/03/2019 10:37
Joined: Sep 2007
Posts: 509
Freedom
Master_Mariner Offline
Club member 583
Master_Mariner  Offline
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Enjoying the ride

Joined: Sep 2007
Posts: 509
Freedom
Originally Posted by pinin_prestatyn
My Flea mapped 20VT was far better on juice than my current golf GTI. I was getting an easy 32 MPG if I was caerful around town.



I asked Mr Flea to provide More Ooomph everywhere- but with improved MPG. He has managed to do both. She takes off much more aggressively, and races like she never did when standard - but the TORQUE is so good- you can just trickle along on the throttle not really needing to stir the gearbox. Its certainly improved the MPG. I made Middle UK to edge of Belgium/start of Germany with 1/4 of a tank left. Perfect for GT cruising!

Regards

MM

Re: Lowest acceptable mpg on a Coop? [Re: JKD] #1632452
12/05/2019 01:21
12/05/2019 01:21
Joined: Feb 2017
Posts: 32
Tasmania
G
Grigio Offline
Club member 1604
Grigio  Offline
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G

Joined: Feb 2017
Posts: 32
Tasmania
Originally Posted by JKD
I've had it serviced a few months ago and got two injectors changed recently, but the idle seems rough and the car heavy and sluggish apart from when the boost kicks in! Also, when starting the car I find I'm now having to press on the gas to help it fire up!


Mine was a dog to start when I bought it, simply wouldn't idle well until warm. I cleaned the idle control valve for a slight improvement, replacing the MAF sorted it. I had quite a task tracking down a good 2nd hand one, new ones are expensive, cheap generic ones are crap.

I've been consistently getting 12l/100kms (23 UK mpg). 6 months ago, coming in to our summer, I had issues with it hunting under boost, I removed the Gtec1 chip and ran it on 91, the hunting improved but overall performance declined, so I went back to the Gtec1 chip and now run it solely on 98. Fuel consumption has gone from 13l/100kms to 12l/100kms.


2000 grigio moon 20VT Plus.

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