15 million cars run on LPG in the European Union. Worldwide, there are 27 million and, it has to be said, a dual-fuel system has a lot of benefits. Let's start with the most obvious: you can fill up at half the price! The major advantage of LPG is the price at the pump: in general, 1 litre of LPG costs up to 50% less than a litre of petrol or diesel. Because it produces less energy than the same volume of petrol or diesel (about 20% less than petrol, for example), fuel costs are 30% less than a petrol engine and 8% less than a diesel engine. On average, LPG is available at 1 in 4 petrol stations in Europe