My LPG dealer told me that manufacturers of LPG systems are working on the direct injection engines.

A bit difficult to explain, but the engine would be running 90 % on LPG and 10 petrol. That means you will always be burning normal petrol too. The actual LPG systems only need petrol to start.

Too bad their is not much support for LPG although it's much better for the environment.

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x5 3.0 (2001)