It varies from 6.7€ to 7€ each 100km depending on the cost of the gas. It has gone a bit high lately, but with petrol at 1.55€....
I guess it is cheaper than using most diesel cars and with the comfort and refinement of petrol :-)
In my old diesel car it would has cost me around 49€ so I think I did the right thing when I transformed my petrol car to LPG :-D... with regular petrol it would have gone circa 68€...
