Two vehicles on LPG. Both from new. Can't remember how may kms per tankful on petrol/gasoline but around 300kms with 45l tanks.  We refuel about every 250 kms when we buy a drink and have a leak and a walk around.Costs between 1.6 and 1.8 per km. Modern engine. It doesn't say no LPG in the manual so I think the cooling system looks after any increase in cylinder head temp. I change the std plugs every time (10,000kms) I change the fully synthetic oil. They are 120 baht each and the labour is inexpensive. 

 

One vehicle has the el cheapo vacuum based demand system similar to old taxis.  I think it was 25,000 at the time, the newer one is injected which cost closer to 40,000 baht. 

 

One has to do the math before deciding 

1 hour ago, tomtaylor1 said:

 they said cannot be done as it is direct fuel injection

You need to find another shop.

Have run 2 jeep Wranglers also a Jeep Cherokee on Lpg, noticed no difference on kilometers covered using 91 or LPG. The cost savings were good as The Jeeps only did around 6.5/6.75 KML. The cost of the conversions were app 30000 Baht each. So at to days prices of 13 Baht for LPG and 28 for 91, = 1.93 KML for LPG and 4.15 baht for 91, after 13500 Kilometers it will have paid for itself.

Also always had a valve saver fluid container fitted, a mixture of 2 stroke oil and diesel, which lubricates the valve seats and stems. Never any problems.

Just out of interest, I took my Audi TTs, to see how much the cost would be to convert to LPG, they said cannot be done as it is direct fuel injection, so have not checked at any other shops, so it might be best to check out that side of things.

Regards Tom   

 This week called into LPG Central Gas Bangkok, this company is recommended by The Italian Company who supply the components for the  LPG conversions. They also said sorry cannot do.

So if any one could let me know of a reliable installer, I would be grateful.

Regards.

Tom  

It may not be engine related? It might be simply that there is no room for the tank? Is it turbo charged? 

Hi Yes it is turbo, there is room for a doughnut tank, I have a Nissan 2.0 Turbo, which was successfully converted to LPG.

The issue seems to be that it is a direct injection engine, the injection system controlled by the engine, not by the ECU.

Thank you.

Tom