Adrenaline
Member
i never get no where near that kind of economy i have a tdi 75 and the norm is 40mpg i mean it is urban but even on a trip to scotland from halifax for £47 worth of diesel i got 540 miles
Google Docs & Spreadsheets
- Thread starter Poor_John
- Start date
Jörgen
Member
Thx Whuy, made some corrections and this should be it then;
http://spreadsheets.google.com/pub?key=ptyE9FgArpQNfB7DKkgnzSg
http://spreadsheets.google.com/pub?key=ptyE9FgArpQNfB7DKkgnzSg
Adrenaline,
Realistically, living in Halifax you can't expect a lot more, it's so hilly and I find that terrain is one of the biggest influences on economy. I've recently moved from Dewsbury (same problem) and now live near Selby. It's all flat and my commute is most all A road and M62 motorway to near Wakefield. No congestion and all near level. I'm now seeing a regular 62 to 64 mpg over a full tank and a best so far of 67 mpg plus. This is all winter driving so I'm confident of cracking 70 mpg when the temperature rises. Driving style is also important as many others have stated. Interestingly I've just bought the wife a Toyoya Aygo 1.0 petrol and that has just averaged 56 mpg on it's first tank of fuel so it bodes well for when it's run in!
Realistically, living in Halifax you can't expect a lot more, it's so hilly and I find that terrain is one of the biggest influences on economy. I've recently moved from Dewsbury (same problem) and now live near Selby. It's all flat and my commute is most all A road and M62 motorway to near Wakefield. No congestion and all near level. I'm now seeing a regular 62 to 64 mpg over a full tank and a best so far of 67 mpg plus. This is all winter driving so I'm confident of cracking 70 mpg when the temperature rises. Driving style is also important as many others have stated. Interestingly I've just bought the wife a Toyoya Aygo 1.0 petrol and that has just averaged 56 mpg on it's first tank of fuel so it bodes well for when it's run in!
Re the poor fuel consumption reported by some TDi owners -
I've seen a few reports of intake manifolds clogging up with carbon deposits on other VAG models (no A2's yet). It appears to affect cars used for short journeys and is caused by a combination of crancase breather oil mist and hot EGR gas both being routed into the intake manifold. See link for pics of a partially clogged manifold.
http://forums.tdiclub.com/showthread.php?t=53541&page=2
Cheers Spike
I've seen a few reports of intake manifolds clogging up with carbon deposits on other VAG models (no A2's yet). It appears to affect cars used for short journeys and is caused by a combination of crancase breather oil mist and hot EGR gas both being routed into the intake manifold. See link for pics of a partially clogged manifold.
http://forums.tdiclub.com/showthread.php?t=53541&page=2
Cheers Spike
Jeetesh
Member
a few hints and tips
- Add a couple of psi to each tyre, it decreases rolling resistance, Michelin Pilot premacy tend to be good for economy, better than bridgestones or pirellis
- remove all unnecessary junk we all carry in our cars
- ensure oil is topped up
- try a fuel additive, this added 3-4 mpg to my car
- remove the back seats, this would add circa 6mpg although not good for security as it leaves items exposed. If you have surprise passengers its not good so this ones a bit extreme. It does however improve overall performance for nothing, fantastic for outrunning rep mobiles on motoways.
- Ease off towards red lights and avoid stopping where possible
- Dont sit with the engine running unnecessarily
- Turn the climate to economy mode
- Drive where possible at constant speeds without heavy acceleration or deceleration
- drive behind some one else in strong head winds on motorways (not tailgating), you'd be surprised at the difference this makes
- Turn off unnecessary electrical items, heated seats etc. This you probably wont notice any difference.
I used to do most of these things and I would average anywhere between 60 and 70mpg regularly and this was diased towards motorway to urban 60%/40% respectively.
Previous comments on that area of the country make a huge difference, when I was living in Essex I would get circa 10mpg more than where I now live in Halifax.
Happy motoring!
- Add a couple of psi to each tyre, it decreases rolling resistance, Michelin Pilot premacy tend to be good for economy, better than bridgestones or pirellis
- remove all unnecessary junk we all carry in our cars
- ensure oil is topped up
- try a fuel additive, this added 3-4 mpg to my car
- remove the back seats, this would add circa 6mpg although not good for security as it leaves items exposed. If you have surprise passengers its not good so this ones a bit extreme. It does however improve overall performance for nothing, fantastic for outrunning rep mobiles on motoways.
- Ease off towards red lights and avoid stopping where possible
- Dont sit with the engine running unnecessarily
- Turn the climate to economy mode
- Drive where possible at constant speeds without heavy acceleration or deceleration
- drive behind some one else in strong head winds on motorways (not tailgating), you'd be surprised at the difference this makes
- Turn off unnecessary electrical items, heated seats etc. This you probably wont notice any difference.
I used to do most of these things and I would average anywhere between 60 and 70mpg regularly and this was diased towards motorway to urban 60%/40% respectively.
Previous comments on that area of the country make a huge difference, when I was living in Essex I would get circa 10mpg more than where I now live in Halifax.
Happy motoring!
Adrenaline
Member
Jeetesh said:
hey im from halifax too
Alan_uk
A2OC Donor
End of Optima experiment
I've now concluded my Optima experiment - an expensive one!
Over the period 27 Nov 06 to 26 Feb 07 the A2 used 160.18 litres, all being Optima except 5.02 filling on 18 Dec and the c 5 litres in the tank at the start. The A2 travelled 2,173 miles in that period.
Mostly A roads with a guestimate of 50% dual carriageway travelling at 65-70 mpg. and the rest at 55-60 mph. Much use of headlights.
The average fuel consumption was 61.73 mpg (4.61 Litres/100km). This is exactly what I have been getting over the last 2 years normally using Tesco's fuel. It is winter (of sorts!) so......
Allowing 6% for the non-Optima, 3% for headlights (some say a 3 mpg hit) and colder weather, then the Optima is probably giving 10% better fuel consumption which is far less than the almost 20% price premium! This was an expensive experiment. I've now gone back to Tesco's fuel to see if the situation changes markedly.
Click the link to see the data
http://spreadsheets.google.com/pub?key=pIeHNXg57w4BQE_qvrOtXIg
Alan_uk said:
I've now concluded my Optima experiment - an expensive one!
Over the period 27 Nov 06 to 26 Feb 07 the A2 used 160.18 litres, all being Optima except 5.02 filling on 18 Dec and the c 5 litres in the tank at the start. The A2 travelled 2,173 miles in that period.
Mostly A roads with a guestimate of 50% dual carriageway travelling at 65-70 mpg. and the rest at 55-60 mph. Much use of headlights.
The average fuel consumption was 61.73 mpg (4.61 Litres/100km). This is exactly what I have been getting over the last 2 years normally using Tesco's fuel. It is winter (of sorts!) so......
Allowing 6% for the non-Optima, 3% for headlights (some say a 3 mpg hit) and colder weather, then the Optima is probably giving 10% better fuel consumption which is far less than the almost 20% price premium! This was an expensive experiment. I've now gone back to Tesco's fuel to see if the situation changes markedly.
Click the link to see the data
http://spreadsheets.google.com/pub?key=pIeHNXg57w4BQE_qvrOtXIg
Last edited:
That's very interesting reading Alan, you've been a very good guinea pig for the rest of us!!
I notice the sign on the pumps only claim "up to an extra 28 miles per tank" from memory at the BP Ultimate Pumps, it's therefore vastly over-priced!
I've been sticking with ordinary BP and Jet diesel and my average has settled down to between 66 mpg and 69 mpg overall.
I had no idea that using headlights uses up to 3 mpg more, is this true?
The only thing I've done to improve economy is run the climate control on ECON and keep the sunroof closed! If it really does make such a big difference I'll stick to side lights in built up areas where possible!
I notice the sign on the pumps only claim "up to an extra 28 miles per tank" from memory at the BP Ultimate Pumps, it's therefore vastly over-priced!
I've been sticking with ordinary BP and Jet diesel and my average has settled down to between 66 mpg and 69 mpg overall.
I had no idea that using headlights uses up to 3 mpg more, is this true?
The only thing I've done to improve economy is run the climate control on ECON and keep the sunroof closed! If it really does make such a big difference I'll stick to side lights in built up areas where possible!
Alan_uk
A2OC Donor
dickhilt said:
Recall reading something like that on this forum but I can't find it. It may be an urban myth.
But see this forum thread on the subject of summer/winter fuel consumption differences. Example data there suggests the difference is 3 mpg (from a number of factors including headlights).
http://www.honestjohn.co.uk/forum/post/index.htm?v=i&t=20656
Hi Alan
I had a quick look at the honestjohn link. Hopefully i'm not going over old ground but can add a few more reasons for a drop in fuel consumption during winter months.
All service stations change to 'winter diesel' around Nov throught to March. I understand this has a lower calorific value and density which both have a negative effect on fuel economy
Not only does the engine take longer to get to operating temp but the gearbox, diff, wheel bearings all absorb more power until they warm up.
Travelling any distance on wet roads means the tyres disperse thousands of gallons of water, absorbing energy and making the engine work harder.
In addition to headlights, heated rear screens, wipers and the electric auxiliary heater on later cars (early cars have the fuel burning coolant heater) all add to the electrical load.
Cheers Graham
I had a quick look at the honestjohn link. Hopefully i'm not going over old ground but can add a few more reasons for a drop in fuel consumption during winter months.
All service stations change to 'winter diesel' around Nov throught to March. I understand this has a lower calorific value and density which both have a negative effect on fuel economy
Not only does the engine take longer to get to operating temp but the gearbox, diff, wheel bearings all absorb more power until they warm up.
Travelling any distance on wet roads means the tyres disperse thousands of gallons of water, absorbing energy and making the engine work harder.
In addition to headlights, heated rear screens, wipers and the electric auxiliary heater on later cars (early cars have the fuel burning coolant heater) all add to the electrical load.
Cheers Graham
Hi Alan
Personally I don't use these premium diesel fuels. Honest John in the Telegraph often sings their praise but I have never read anything scientific which shows they are worth the money. As far as I know, all diesel engines are designed to run on standard fuel which meets the EN 590 spec so that's good enough for me.
Cheers Spike
Personally I don't use these premium diesel fuels. Honest John in the Telegraph often sings their praise but I have never read anything scientific which shows they are worth the money. As far as I know, all diesel engines are designed to run on standard fuel which meets the EN 590 spec so that's good enough for me.
Cheers Spike
Just managed 72 mpg overall on my latest tank of ordinary BP diesel (402 miles before fuel light illuminated and the buzzer woke me up!). Just can't see how paying the extra for ultimate would make any difference, the engine just seems so efficient. Obviously very well pleased with the little car.
Trouble is, probably like several others on the forum, it's becoming a bit of an obsession trying to raise the mpg every tank!
Trouble is, probably like several others on the forum, it's becoming a bit of an obsession trying to raise the mpg every tank!
