The larger sized numbers on fuel pump stickers show the octane score of different gasoline grades. Generally, gasoline stations provide gasoline with three octane levels. In 1922, the U.S. federal government published the first specifications for aviation gasolines (two grades had been selected as "fighting" and "domestic" and were governed https://a1jetfuelbuyers71962.bloggactivo.com/26354179/the-2-minute-rule-for-gasoline-sds