The present invention provides an upgraded synthetic gasoline having a true boiling point (TBP) range of between 50.degree. C.-300.degree. C., a sulphur content of less than 1 ppm, a nitrogen content of less than 1 ppm, an aromatics content of between 0.01%-35% by weight, an olefins content of between 0.01%-45%, a benzene content of less than 1.00% by weight, an oxygen content of between 0.5-3.0% by weight, a RON of greater than 80, and a MON of greater than 80. The invention also provides processes for the production of the upgraded synthetic gasoline wherein the synthetic products derived from a Fischer-Tropsch reaction are passed to a cracking reactor to produce a synthetic gasoline stream which is subsequently fractionated and upgraded using an oxygenating reactor, and optionally a combination of an MTBE reactor, a dehydrocyclodimerisation reactor and C5 isomerisation reactor. The upgraded synthetic gasoline is useful as a fuel.