Information Yearly stats for running lpg conversion to a2 (2001 1.4 petrol).

P

pamanal21

A2OC Donor
HI ALL, these are my stats for dec 2011-dec 2012,as follows;
LITRES LPG purchased @ 70p litre =1115.61,
COST OF SAME £781.00.
ACTUAL MILES TRAVELLED 8315.
AVARAGE MPG 34.
COST PER MILE (approx) 9.5p

THIS IS WHAT IT WOULD HAVE COST USING PETROL.
LITRES PURCHASED 1115.61,
COST OF SAME @ £1.40 ltre £1561.85.
AVERAGE MILES TRAVELLED @ 44mpg = 10799 (cost per mile 14.5p)
THE DIFFERANCE IN-BETWEEN THE TWO 2484 miles
TO COVER THE EXTRA MILES IN LPG WOULD BE (2484 DIV 34 =73.06 gallons x 4.5460=332 litres
332 litres x 0.70 per litre = £232.40.


THE MAIN DIFFERENCE IS CASH SAVING OF:£548.60,
Hope this is of some interest to A2 owners,
cheers ALAN.
 
Very interesting! 9.5p/mile is good. For comparison, a TDI doing 67mpg costs 9.5p/mile at current diesel prices (140p/litre), and there are few TDIers here who average 67mpg.

Your average mpg using LPG is 34mpg, whereas using petrol you've quoted 44mpg. Is this correct? Does the car do 10mpg less when running on gas?

Cheers,

Tom
 
Tom yes you get less mpg with gas. Mum had a mpg ford and that got less mpg but you pay a lot less for it so save that way.

Cheers

David
 
Hi timmus, as david has said,you loose on the MPG but the savings are made on the cost of LPG, ie 0.70p as against the
£1.40 that PETROL costs which balanced out LPG is still the winner, probably around a third saved in all, cheers
ALAN.
 
Very interesting. You've been more than generous to with your petrol calculation in my experience, if they are purely hypertetical, 23% loss is alot.

May I be nosey and ask what the conversion cost??
I suspect a good Diesel would cost similar to a good 1.4+conversion. Loss of mid range punch would certainly be made up for by a good penny/mile fuel saving IMO.


Your mileage isn't too dissimilar from mine either. As I said, very interesting.
 
It is an interesting comparison however given the savings are marginal I will stick with diesel and enjoy the torque!
 
pamanal21 said:
HI ALL, these are my stats for dec 2011-dec 2012,as follows;
LITRES LPG purchased @ 70p litre =1115.61,
COST OF SAME £781.00.
ACTUAL MILES TRAVELLED 8315.
AVARAGE MPG 34.
COST PER MILE (approx) 9.5p

THIS IS WHAT IT WOULD HAVE COST USING PETROL.
LITRES PURCHASED 1115.61,
COST OF SAME @ £1.40 ltre £1561.85.
AVERAGE MILES TRAVELLED @ 44mpg = 10799 (cost per mile 14.5p)
THE DIFFERANCE IN-BETWEEN THE TWO 2484 miles
TO COVER THE EXTRA MILES IN LPG WOULD BE (2484 DIV 34 =73.06 gallons x 4.5460=332 litres
332 litres x 0.70 per litre = £232.40.


THE MAIN DIFFERENCE IS CASH SAVING OF:£548.60,
Hope this is of some interest to A2 owners,
cheers ALAN.
Click to expand...

Alan,

Have you got this right?

For gas, 8315m at 34mpg is 244.6g or 1110L at a cost of 1110 x £0.70 = £777.21

For petrol, 8315 at 44mpg is 189g or 858L at a cost of 858 x £1.40 = £1201.14

which is a saving of £423.93

Still a saving though!

RAB
 
Yes, an interesting comparison of running costs! Just a couple of other points to mention .... Firstly, you have to carry the addition LPG tank. Even if you go for the smaller "doughnut" type of tank, you are still compromised with where any luggage or shopping is stored. It has to be on the back seat! Then cost of the road-fund ..... diesel is just £30 per year, but LPG is based on the petrol rate of £135, less, I believe, £25 for an approved conversion to LPG. That difference needs to be taken into account with the "cost-per-mile" comparisons, and at ~ 8000 miles per year, will add about 1p per mile. I feel that if you own the diesel version of the A2, then that is a close match on economy to a converted LPG A2. Did you know that even with a diesel version, approximately 35% of the fuel can be replaced with LPG? You can also run your A2 on used cooking oil!

David
 
Adrian888 said:
It is an interesting comparison however given the savings are marginal I will stick with diesel and enjoy the torque!
Click to expand...

Oh, it ain't tempting me away from my 185lbft eco-machine, but nevertheless it's interesting that the 1.4 petrol can, with a little investment, have similar price per mile figures.

RAB, I too was a little confused by the maths.

Tom
 
I have also heard of diesel/LPG conversions but never seen one or spoken to anyone actually using one. And given the potential to use re-cycled cooking oil a diesel can be even cheaper to run.
 
HI ALL,
re the cost of my lpg conversion, i managed to get a real bargain, the actual cost being £700 BRILLIANT!! i think the normal cost would be around double what i paid approx £1400.00 or so. Have been told that you can't convert the deisel to LPG but that was awhile ago so things may have changed?? my figures are as best i can do (am Victor Meldrew you know) as you can guess we all like the proverbal BARGAIN!!
PS, one other thing re lpg, on start up of A2 you run on joint petrol & lpg for first 3/400 yards ( or approx 5 degree's),ALAN
PPS,my do-nut tank is fitted into the base boot level, so my space saver tyre has moved up a level onto normal boot area but can honestly say have never had any problems with storage, have done holidays/ weekly shopping for two,grans 3 wheel trolly, just to mention a few,yet to ever have to use rear seat space,
Cheers ALAN.
 
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pamanal21 said:
... Have been told that you can't convert the deisel to LPG but that was awhile ago so things may have changed?? ...
Click to expand...

My understanding is that:

* It is possible to add LPG mist into the air intake, but you still need to be running on a mainly diesel mixture
* The effect is to have an earlier, more rapid combustion, and this will mean that some diesel which would have been unburned on the normal setup (17%) will also get combusted, hence less soot & higher overall efficiency
* It can potentially burn through the piston heads if the mix is not right (because of the earlier combustion, the peak cylinder pressures & temperatures go much higher)
* If the lpg is not fully shut off it can cause an engine-runaway at idle

For drag racing etc it can be used in quantity, but mostly because the long term survival of the engine is irrelevant.

The savings are small compared to the installation cost, and in my personal view the risks are far too high.
 
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ULP said:
Not sure on the maths Alan, much easier to work out as follows;

8315 miles at 44mpg = 189 gallons (859 litres) which, at £1.40 per litre is £1203 per annum, so an extra cost of £422 for petrol. Still, even if it cost £1000 to install that's a payback of less than 2.5 years, assuming you never need to use petrol!
Click to expand...

Except using £1.40/L is a little on the high side for petrol. With very limited data I briefly googled, it is roughly under 137p/L for Jan-Oct 2012 and I remember the pumps were <140 in the last few months (my last fill up at Shell was 129p/L this week).
 
humps said:
Except using £1.40/L is a little on the high side for petrol. With very limited data I briefly googled, it is roughly under 137p/L for Jan-Oct 2012 and I remember the pumps were <140 in the last few months (my last fill up at Shell was 129p/L this week).
Click to expand...

127p on my last fill up. I don't think I've paid higher than 135p in my ownership of the A2 (since last March). Nice savings though, if only it could be done to the FSI...
 
Very interesting indeed!
Remember though all you diesel lovers still have the rattle, lag and noise as in the petrol it's more refined no matter how you approach it. ... :)
 
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