Oxygenated Fuels

Gasoline blended with additives that contain oxygen promotes more efficient combustion and reduces tailpipe emissions of carbon monoxideA colorless, odorless and highly poisonous gas produced largely by automobiles that results from the incomplete combustion of carbon-based materials. More. Maricopa County service stations sell oxygenated fuelsGasoline blended with additives that contain oxygen promotes more efficient combustion and reduces tailpipe emissions of carbon monoxide. Maricopa County service stations sell oxygenated fuels from October through March. More from October through March.