The price of LPG, like any product is driven by demand, if more people start using LPG the price will go up. When I was looking at converting my car to LPG in 1998 it was 22cpl and I bought a second hand system, before I got it installed the price shot up so I didnt go thru with it. LPG, starting in 2011 will be taxed 2.5cpl per year until it reaches 12.5cpl, so the govt will make any money back that they give out now in excise in the future.