mouche wrote:And you get the same mileage after converting?
I've no direct experience but from what I have read you get about two thirds of the MPG and in Greece you pay about 60 % of the price per litre. That converts to a saving of about 12 %. In the UK there is a much bigger difference between the price of LPG and petrol so it is more viable.
Diesel is more cost effective in Greece regarding running costs. Diesel is currently about 20 % cheaper than petrol BUT you also get between 10 % and 20 % better consumption so between 30 % and 40 % saving. Unfortunately diesel cars are more expensive than petrol cars by a bigger margin than the LPG conversion so it is debatable which is best overall. Probably depends if you do high mileage.
PS My experience of driving on the mainland is that petrol is between 10 and 20 cents cheaper than in Crete.