However, when compared to petrol cars with a catalyst, diesels have higher emissions of NOx and much higher emissions of particulate matter. When used as a vehicle fuel, propane can offer life cycle greenhouse (GHG) emissions benefits over conventional fuels, depending on vehicle type, age, and drive cycle. 96-118 (1996) Describes health effects and current standards and guidelines relating to carbon monoxide, as well as recommendations for workers, employers, and manufacturers regarding small gasoline powered engine safety. Gasoline and diesel fuel contain approximately 86 wt-% of carbon and 14 wt-% of hydrogen but the hydrogen to carbon ratio changes somewhat depending on composition. ALERT: Preventing Carbon Monoxide Poisoning from Small Gasoline-Powered Engines and Tools DHHS (NIOSH) Publication No. Diesel fuel demand continues to rise, particularly in China as construction demands continue to rise there. Propane fuel has a lower carbon content than conventional gasoline and diesel fuel. Paraffinic hydrocarbons, especially normal paraffins, improve ignition quality of diesel fuel, but low-temperature properties of these paraffins tend to be poor. The reason for this dif-ference is the well-known fact that carbureted engines gen-erally operate with a deficiency of air whereas Diesel engines always operate with a substantial excess of air. Propane Vehicle Emissions. than 0.1% carbon monoxide, whereas the carbon mon-oxide concentrations in the exhausts of the carbureted engines ranged from 1.5 to 12%. The U.S. Energy Information Administration (EIA) estimates that in 2019, U.S. motor gasoline and diesel (distillate) fuel consumption in the U.S. transportation sector resulted in the emission of about 1,091 million metric tons (MMmt) of carbon dioxide (CO2) and 455 MMmt of CO2, respectively, for a total of 1,546 MMmt of CO2. It produces less CO2, Carbon Monoxide, Nitrogen Oxide, hydrocarbon and particulate emissions. Diesel fuel contains no lead and emissions of the regulated pollutants (carbon monoxide, hydrocarbons and nitrogen oxides) are lower than those from petrol cars without a catalyst. For one, propane is a cleaner fuel than both diesel and gasoline. While the Espar and Webasto require you to perform yearly maintenance to clean out carbon buildup, the Propex system does not require maintenance. These facts combined to give diesel fuel a bad environmental name, even though it in fact emits lower amounts of carbon monoxide, hydrocarbons and carbon dioxide than does gasoline. Diesel contains more carbon than petrol but carbon dioxide (CO2) emissions of diesels tend to be lower.