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Fuel Consumption

C

channella

PCGB Member
Member
I've noticed a reduction in economy over the past couple thousand miles. On average encomony is down about 2-3mpg. I thought it might return to previous levels after the 48k service, but evidently not. Any ideas as to what might be going on?
 
Andy, good thoughts but I'm using same fuel and buy most of my fuel at the same location, and the aircon is on if the roof is up.
 
I find in winter the fuel consumption suffers as the engine takes longer to reach operating temperature and the enrichment is on for longer.
 
Silly question - Is your tyre pressure down/lower than before just a couple of PSi could do it.
 
ORIGINAL: boxster27

Andy, good thoughts but I'm using same fuel and buy most of my fuel at the same location, and the aircon is on if the roof is up.
Click to expand...
It's a stab in the dark but if the aircon is on when the roof is up, is it not posible that the roof is going to be up more at this time of year. Also Martin's theory about the engine taking longer to reach operating temprature needs to be taken into account.
It's all these little things that have an accumulative effect.
 
Thanks for the thoughts and inputs. Understand about the different power needs of the time of year, but this is my 4th winter with the car and it hasn't been the coldest yet. My sense is of worsened consumption is compared with a long period of time, not a recent summer/winter comparison. But they are all valid ideas, so thanks again.
 
Hi,
I've got a 3.2 Boxster S , had it about a month now and love it and thats part of the problem: my wife and I use it at every opportunity leaving our everyday car (a Jaguar X-Type Diesel Estate) sitting in the driveway. Consequently our fuel consumption to date is a touch lower than I would have hoped (lots of short journeys). Seems to be 23 -24mpg which I suppose is not bad for a 3.2 litre car but my old 964 3.6 averaged 27mpg-ish though I tended to use that for longer journeys. Interesting to see how this compares with other owners.
 
Hi
My 2001 2.7 long term average is 24.2 mpg.
Driving is mainly 15 miles urban traffic to work and back - combined with a 150 mile or so run out to the coast at weekends.
Steve H.
 
MY00 2.7 returned just over 30 MPG over a 6 month period. Full range of urban/motorway/track.

It's a Boxster by the way. [;)]
 
I do a 20 mile round trip 5 days a week which consists of a roughly 50/50 mix of town and open road driving and I get 25-26mpg. On my last run from Nottingham to the Goodwood FOS, I got 31mpg.
 
My 2003 3.2 gives 19mpg in London traffic on V-Power, on other fuel (tesco99, BP ultimate) it is less; motorway is around 32mpg...
 

My 2000 MY "S" averages about 28 per tank full on a mixture of A & B roads and motorways but on the I O M about 13mpg[:)][:D] - it must be the hills???
 
My 03 3.2s is used daily and is 26-27mpg around town and 30-32mpg on the mway. I heard that the fuel consumption is fairly similar in both cars and i would just buy the best car you can find, they will both bring a smile to your face.
 
My 06 2.7 averaged 34.1 on a 2500 mile european trip last June we did France, Germany, Austria, Italy and back into France then UK. Just last weekend we did a rally around Cumbria and Yorkshire then into the Lake District, the average MPG was slightly less at 29.4 on a round trip of aprox 700 miles. This included some hard driving but also about 400 miles of Motorway crusing. Fuel is Super Unleaded wherever posible either Shell or BP.
 
Thanks guys for all the info; I've now a much better idea of what to expect - now looking for that blue 2.7 with beige leather . . . .
 
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