Well I have to chime in most of the Liberty guys eat cabbage and corn bread, pinto beans, sort of make gas This is passed thru the headhunter into a chamber where the sludge is heated and the methane gas is removed and stored in a vessel, the sludge is then moved on to the holding tank. Now for the kicker the methane is injected via compressed air into the fuel injector sort of like nitro in a dragster. Bottom line we get 10- 12 mi to the gallon. This process is called blowing smoke, no need to dicker on camp site prices!