| abstract |
(57) [Summary] [Purpose] To provide unleaded high-octane gasoline that is excellent in the effect of suppressing NOx in exhaust gas and in drivability when the engine is cold. [Structure] Research octane number is 98.0 or more, Reid vapor pressure (Rv) is 0.40 to 0.95 kgf / cm 2 , and density (at 15 ° C) is 0.735 to 0.755 g / cm 3 , sulfur content of 50 mass ppm or less, methyl-t-butyl ether content in total amount of gasoline, hydrocarbon content of 5 carbon atoms, hydrocarbon content of 6 carbon atoms, carbon A gasoline whose paraffinic hydrocarbon content of several 5 is in a specific range. |