Ohmasa adds LPG to O-gas as an octane booster. A more compatible engine to take advantage of the inherent nature of O-gas is a diesel engine. The Papp engine is the type of engine that is most compatible with the very low octane of O-gas. An O-gas shock wave will travels at the speed of light and needs to operate in the combustion chambers of a purpose built engine.
Without an octane booster, O-gas will blow a gasoline engine apart from explosive levels of knocking.
I would like to see O-gas used in a Popper like Bob Rohner has built to see if the Popper can handle the ignition power.http://www.rgenergy.com/Projects.html
Maybe Russ can fire up his popper to run an experiment or two.