Do you think it would be worth converting my new Holden Captiva auto, which is getting 11 L/100 km on average, to gas? I do 15,000 km per year and plan to keep it for about five years. If so what is the best type of system to use?
The LPG system manufacturers are working on kits for the Captiva and they should be available within weeks. From what I am told they are developing both vapour and liquid injection systems, and either would be fine. Of the two liquid injection would be the better, but I would expect it to be more expensive. Generally you would pay off the cost of a vapour-injection system in about 12 months, which makes it a good proposition given you plan to keep the car for five years.