Has any one coverted there car to run on lpg? Ive got 2 diesels and just pondering on prices and weather its financialy viable or not.

According to experts on line, they do not recommend converting diesels to lpg. The technology for the lpg conversion on diesels has not caught up to petrol cars yet. Still considering whether to convert my petrol car to lpg, as I do 20k miles a year. 

Cheers man. I had a 44 ton truck that had the lpg convertion.

 weather its financialy viable or not.

It isn't. Petrol cars are good for LPG conversion because they can run almost on LPG with little use of petrol and this conversion isn't that expensive (except direct injection cases - FSI engines for Skoda). Diesels are said to be hard for conversion and, at least in past, it was said that in this case LPG consumption could be only ~30%...what's the point?

It's different for trucks because they are large, they got place to install these systems (if they got THAT large diesel tanks, imagine the size of LPG tanks if you don't with them to refuel every 100km) and they drive a lot.

 

Just for statistics - cars in Latvia:

48,84% - diesel;

43,20 - petrol;

7,94% - petrol&LPG;

0,001% - diesel&LPG.

 

Trucks:

 

92,29% - diesel;

5,23%- petrol;

2,39% - petrol&LPG;

0,056% - diesel&LPG.

 

If they were that good, people would use them more often.

 

My colleague has LPG installed in his 1,8 (130 hp) Toyota. It consumes ~10l/100km.

Rough calculations:

if it's run on petrol: up to 8 euros/100km.

if it's run on LPG: 5,5 euros/100 km.

My 2,0 TDI (140hp) can be ~6 euros/100km.

 

Diesel is already cheap and close to LPG numbers. Are you really wishing to install this system on already complex engine, pay a lot  etc. etc. to get some minor fuel consumption improvement?

It isn't. Petrol cars are good for LPG conversion because they can run almost on LPG with little use of petrol and this conversion isn't that expensive (except direct injection cases - FSI engines for Skoda). Diesels are said to be hard for conversion and, at least in past, it was said that in this case LPG consumption could be only ~30%...what's the point?

It's different for trucks because they are large, they got place to install these systems (if they got THAT large diesel tanks, imagine the size of LPG tanks if you don't with them to refuel every 100km) and they drive a lot.

 

Just for statistics - cars in Latvia:

48,84% - diesel;

43,20 - petrol;

7,94% - petrol&LPG;

0,001% - diesel&LPG.

 

Trucks:

 

92,29% - diesel;

5,23%- petrol;

2,39% - petrol&LPG;

0,056% - diesel&LPG.

 

If they were that good, people would use them more often.

 

My colleague has LPG installed in his 1,8 (130 hp) Toyota. It consumes ~10l/100km.

Rough calculations:

if it's run on petrol: up to 8 euros/100km.

if it's run on LPG: 5,5 euros/100 km.

My 2,0 TDI (140hp) can be ~6 euros/100km.

 

Diesel is already cheap and close to LPG numbers. Are you really wishing to install this system on already complex engine, pay a lot  etc. etc. to get some minor fuel consumption improvement?

 

 

Not in the UK, diesel is around the same price as unleaded (£1.03 per litre)

The lpg "liquid" injection systems look interesting for the direct injection petrol models. Original direct injectors used. Latent heat of evaporation(liquid>gas) cooling just below valves could help re valve recession (caused by localised "welding") and possibly reduce carbon buildup due the same cooling effect -offset by a hotter lpg combustion!

http://www.environmentallyfriendlycar.co.uk/index.php/gas-conversions/97-petrol-engines-and-gas-conversion/lpg-autogas-and-direct-injection-engines/118-direct-injection-petrol-engines-and-liquid-lpg-injection

Edited 8 November, 201510 yr by bigjohn

Not in the UK, diesel is around the same price as unleaded (£1.03 per litre)

 

 

I know but I meant a bit different thing. Diesel car consumes less (let's say - 5 l/100 km while petrol can consume some 7 or 8 l/100 km) and actually it doesn't matter much if diesel is some 5% less or more expensive than petrol.

Edited 8 November, 201510 yr by Jevpls

The lpg "liquid" injection systems look interesting for the direct injection petrol models. Original direct injectors used. Latent heat of evaporation(liquid>gas) cooling just below valves could help re valve recession (caused by localised "welding") and possibly reduce carbon buildup due the same cooling effect -offset by a hotter lpg combustion!

http://www.environmentallyfriendlycar.co.uk/index.php/gas-conversions/97-petrol-engines-and-gas-conversion/lpg-autogas-and-direct-injection-engines/118-direct-injection-petrol-engines-and-liquid-lpg-injection

There is only one disadvantage - the price. Are you willing to pay 2k pounds for that? Seriously, this kind of system is very expensive and it's good in 2 cases:

1) you have a really high annual mileage (why don't you buy a diesel then?).

2) you have some Audi with 4l petrol engine (why do you buy such an expensive car if you can't even afford to buy petrol?).

 

Previous LPG systems were significantly cheaper.

 

EDIT: that Audi in the example might be V6 or even V8 - so you can easily double the expenses

Edited 8 November, 201510 yr by Jevpls

There is only one disadvantage - the price. Are you willing to pay 2k pounds for that? Seriously, this kind of system is very expensive and it's good in 2 cases:

1) you have a really high annual mileage (why don't you buy a diesel then?).

2) you have some Audi with 4l petrol engine (why do you buy such an expensive car if you can't even afford to buy petrol?).

 

Previous LPG systems were significantly cheaper.

 

EDIT: that Audi in the example might be V6 or even V8 - so you can easily double the expenses

Indeed NO     not for me - agreed that looks expensive and you could buy an awful lot of petrol with the cost of the system (in the UK diesel is nearly the same price as petrol with lpg about half - £0.499/litre near me) . I just think the liquid injection systems look interesting, these really do reduce tailpipe emissions, especially the really nasty ones

Saying that, cost is why I ended up buying a petrol anyway - I got a huge discount on a nearly new petrol Superb and I reasoned I could buy an awful lot of fuel with the difference to an equivalent model/age/miles diesel car. I keep cars a long time so tend to ignore depreciation and by my original calculations the difference in price paid for the extra fuel consumption for 15 years! However the big surprise is my actual economy is 5 mpg better than expected  :clap:  Long term - who knows - we shall see..............

 

I don't want a diesel now a new one has a very expensive "factory" built into the exhaust system , DPF/urea injection- I know too many people who have had numerous high ticket expenses to do with DPF technology (getting worse as the miles pile on) and I can imagine the new urea injection is only going to make things worse. In addition I was trying to avoid a DMF (never failed in my previous Superb though in 170k miles) and I don't like concentric clutch slave cylinders. 

 

 

 

In the future - it gets worse - GPF technology coming soon

Edited 8 November, 201510 yr by bigjohn

Doesn't the LPG convesion in a diesel give a more complete, cleaner burn of the diesel which gives more power and economy?? Read about it a while back but don't have any up to date info.

Doesn't the LPG convesion in a diesel give a more complete, cleaner burn of the diesel which gives more power and economy?? Read about it a while back but don't have any up to date info.

 

Like I said above, it's said that only 30% of LPG would be in the diesel/LPG mix (I might be wrong but I read it somewhere). I hardly see any economy there, especially you have to pay for the LPG system itself first and I guess that might be expensive for diesel.

 

About more power. LPG has even higher combustion temperature than petrol and it seems that such engine could be more powerful. Actually it isn't. It's weaker... Why? I've heard that it works well in really high pressures and it's actually not possible in case with some car's engine. So, things are good in theory

what diesel do you have?  if a non pd, you can run on veg, if a pd, then biodiesel