EghtesadOnline: Over 90% of regions in Tehran Province are supplied with Euro-4 quality gasoline and diesel, the managing director of Tehran's National Iranian Oil Distribution Company said.

EghtesadOnline: Tehran Refinery signed an agreement with the Petrochemical Commercial Co. (PCC) on Saturday for producing a type of catalyst used in the production of gasoline that complies with Euro-4 emission standards.

EghtesadOnline: Euro-4 standard gasoline is being sold in 40 Iranian cities, the environmental chief said on Wednesday, stressing that using natural gas as feedstock in petrochemical and power plants instead of mazut has notably decreased air pollution and its associated illnesses such as asthma.