I've seen a website that offers advice on Browns Fuel and they supply equipment to run on diesel engines. The principle sounds good but has any one got personal experience on this type of technology. It cost about the same as LPG to install but it could give better performance, cleaner emissions and is cheaper to run as the the boost comes from the electrolysis of water. Claims are as much as 25 - 35% economy.

search google for browns gas.
then when youve stopped laughing, report back here.