The article says that for every pound of fuel, the engine produces a pound of water. But that water is not going into the sump but out the exhaust. I have run some of my cars on LPG and the
oil stays or looks a lot cleaner. Also since fuel injection engine shut of the fuel the instant you switch of the engine, there isn't any fuel draining into the sump. Where as a carby, as the engine runs down as you switch of the ignition, it will continue to suck in more fuel and it doesn't get burned. JD