astra burning lots of fuel?

Kanifee

Kanifee

Kanifee

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13 May 2007
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On the wagon, sorta
just purchased an astra 1.6 16v LS to tied me over for 4 or 5 months to save some pennys for a decent motor, managed to find a clean x reg with 58k on the clock, lady who had it used it for the school runs for the kids, her mother who had it before her used it to potter around in hence the low mileage.

having had a 306 oil burner with no turbo i got used to decent mpg though i did expect to put a few quid more into the tank moving to petrol. ive made a point of letting the red lihgt come on, putting a tenner in and waiting for the red light to come back on, done this 3 times to get a good average and each time its around 50 miles, used an online calculator and it appears im getting 26.3 mpg.

bearing in mind im driving like miss daisy does this seem high to any one else or am i being a tight arse?
 
The method you are using isn't ideal for getting a good MPG, brim the tank, drive for 100* miles then brim again, cost of those 100* miles is how much it costs to second time to brim.

When was it last serviced? Might not have had the filters and oil changed for a while? I'd expect it to do better than 26MPG.

*Can be any mileage really but the more the better.
 
Do you spend all your time in town?

If so, that sounds about right, though really the method of calculation is meaningless.

Stop putting tenners in and brim the tank.
 
Sounds right, especially if it's mostly run when cold- it'll still be running on the choke most of the time in that case, hence the lower mpg.

Diesel's don't have that problem, so that's why your old 306 got better mpg figures.

Of course, I could be completely wrong but I have found that dervs run more efficiently when cold compared to petrols, though performance can suffer sometimes.
 
[TW]Fox;17736675 said:
Why would it be running on a choke :confused:
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I'm referring to the fuelling control done by the ECU. Just another way of saying it. :)

Of course they still need to warm up, but petrol vs diesel mpg aside, dervs happen to run more efficiently when cold. The difference when town running (near-cold vs warm) is 5 mpg at best.
 
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to be honest its is mostly town driving, need to get used to it if im going to buy something of any real substance that or invest in a good pedal bike :P, just hurts paying to drive something of no substance :D

ill brim the tank and see how that reports though i should imagine itll be around the same ball park.
 
Assuming the results are accurate then 27mpg is bad. The hire Astra's I used to drive did 35-40mpg easily on a run.

As above - check the tyres and get the car serviced properly if it hasn't been done recently, and check the range properly by brimming the tank.

Last time I stuck a tenner in I was a student - it got me 3/4 tank of 4* for my Nova...
 
lol ill have a check over, £10 seemed a happy medium for a regular fill and enough miles to do the calculation
:D
 
Give it a little italian tuneup as well, go rev the nuts off it (when warm obviously).. it certainly can't do any harm. Might get a few mpg from that.
 
Flibbles said:
Of course they still need to warm up, but petrol vs diesel mpg aside, dervs happen to run more efficiently when cold. The difference when town running (near-cold vs warm) is 5 mpg at best.
Click to expand...

Interestingly I find the opposite. Cold diesels have much less torque and use more fuel in my experience than when they are warm.
 
Joe T said:
Interestingly I find the opposite. Cold diesels have much less torque and use more fuel in my experience than when they are warm.
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I definitely feel the reduced performance when it's cold and while it does use a little more fuel I still get a good 40mpg when town driving.

I can't complain at any rate.

EDIT: Just realised that you thought I implied that dervs use less fuel when cold, I actually meant that when comparing a cold petrol and cold diesel engine, the diesel runs much closer to its warm mpg compared to its petrol counterpart.
 
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