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Author Topic: High fuel consumption.  (Read 3832 times)

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middy

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High fuel consumption.
« on: 15 March 2011, 17:01:31 »
2.2 Tdi Elite 03

The dashboard readout tells me that my fuel consumption is around 30 - 33 mpg. This is doing runs on the open road at 70 mph so i should be getting somewhere around the 50 mark.
Have filled the tank completely and will verify the fuel figures once I've got through half a tank.

There are no fault codes present and I had the emissions checked which it passed through without any hesitation, the oil level is correct , last changed 10 months ago (6000 miles).Had the car on a ramp and inspected for leaks, found nothing but thats not to say one does'nt exist.

Recent work includes crankshaft sensor replacement, and angle of rotation sensor replacement on fuel pump. The fuel pump issue was carried out about 4 months ago but it is only in the last month whilst doing high mileage that I've noticed a consumption problem.

If anyone can give me some direction, it would be greatly appreciated.Thanks.
« Last Edit: 15 March 2011, 17:05:41 by middy »
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russ0205

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Re: High fuel consumption.
« Reply #1 on: 15 March 2011, 20:52:28 »
My dashboard readout lies about fuel consumption,

 :( :( :( :( :( :( :( :( :(
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sport

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Re: High fuel consumption.
« Reply #2 on: 15 March 2011, 22:39:35 »
Did you reset the avg mpg when you are doing 70
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Andy B

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Re: High fuel consumption.
« Reply #3 on: 15 March 2011, 22:46:48 »
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.... so i should be getting somewhere around the 50 mark.  ....
Where does this figure come from? My 1.7TD Astra only does 45-ish mpg

Quote
............ last changed 10 months ago (6000 miles).......
You should be changing it more frequently than this. They suggest 3/4000 miles here although my Astra get it done about every 5000  miles, it's easier to keep track  ;) ;)
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middy

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Re: High fuel consumption.
« Reply #4 on: 16 March 2011, 18:05:54 »
Quote
Did you reset the avg mpg when you are doing 70


Yes I reset all trip counters, but wont know if its lying until I top up after I've got through half a tank. done about 140 miles at the mo and the needle has dropped to about 1/4 tank used.
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middy

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Re: High fuel consumption.
« Reply #5 on: 16 March 2011, 18:15:51 »
Quote
Quote
.... so i should be getting somewhere around the 50 mark.  ....
Where does this figure come from? My 1.7TD Astra only does 45-ish mpg

Quote
............ last changed 10 months ago (6000 miles).......
You should be changing it more frequently than this. They suggest 3/4000 miles here although my Astra get it done about every 5000  miles, it's easier to keep track  ;) ;)

Ok maybe 50 mpg is pushing it a bit, but there is no way it should be in the low 30's on a 70 mile round trip.

as for the oil, genuinely though i was on the ball with my change routine ! oh well it's due now anyway so time to jack her up !
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sierrapaul

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Re: High fuel consumption.
« Reply #6 on: 16 March 2011, 21:08:52 »
im only just getting 34mpg outa my 2 litre 8valve cavalier on a run.my mates got a 2.2 vectra and thats crap on fuel.even after he had a full service at vx its only doing 31 on a run.paul
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geoffr70

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Re: High fuel consumption.
« Reply #7 on: 16 March 2011, 21:17:48 »
makes me pleased with my 34 mpg from 3.0 auto elite on a 70-80 run! And sometimes alot faster!
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sierrapaul

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Re: High fuel consumption.
« Reply #8 on: 16 March 2011, 21:23:16 »
im getting 32 outa my 3litre auto elite on a run and abbout 27 round town its realy good for a v6.paul :)
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geoff

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Re: High fuel consumption.
« Reply #9 on: 17 March 2011, 07:10:04 »
have you changed the fuel filter makes a big difference :y :y : :y
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middy

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Re: High fuel consumption.
« Reply #10 on: 17 March 2011, 08:57:23 »
Quote
have you changed the fuel filter makes a big difference :y :y : :y
thanks for that tip .I'lll sort that one today
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star_whites

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Re: High fuel consumption.
« Reply #11 on: 17 March 2011, 12:52:17 »
Your lucky Ive been averaging around 14 mpg around town. Ok I have a heavy foot but still think its low.
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twiglet

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Re: High fuel consumption.
« Reply #12 on: 17 March 2011, 13:02:08 »
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Your lucky Ive been averaging around 14 mpg around town. Ok I have a heavy foot but still think its low.

Sounds like you are actually towing your town around to get those figures!!  :-/
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middy

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Re: High fuel consumption.
« Reply #13 on: 27 March 2011, 19:24:43 »
The dashboard readout was correct in terms of fuel. I changed fuel and air filter and renewed the oil. I'm now getting around the 40 MPG mark which is a considerable improvement  :)
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Road Hog Mad

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Re: High fuel consumption.
« Reply #14 on: 27 March 2011, 19:28:28 »
the first half of the full tank has more than the rest of the 1/2 tank if that makes sense.
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