The Rentar Fuel Catalyst is an independently verified pre-combustion contact catalyst with 27 patents that reduces fuel consumption, greenhouse gas emissions, particulate matter, and other pollutants. It has been shown to reduce fuel consumption by 2-12% for engines and 7-30% for furnaces/boilers. The catalyst also reduces emissions such as particulate matter by up to 20% and has been verified by numerous government agencies and laboratories. It can be used in various on-road, off-road, marine, and industrial applications.