Fuel was a type of material used to power vehicles. Starships, such as the Ghost, were powered by fuel. During the Nihil conflict, fuel was very expensive for civilians. The Wookiee planet Kashyyyk hosted an oil refinery, which was a critical location during the Battle of Kashyyyk. Fuel prices heavily rose during the galactic recession of c. 9 ABY.
Types of starship fuel in the galaxy included rhydonium, a volatile type of fuel found on the planet Abafar, baradium nitrate, deuterium, ipsium, found exclusively on Ipsidon, kessoline, mined on Kessel Malastarian fuel, megonite, Nergon-14, rippinnium, sodium, tibanna, and Zylium 12.
Some fuels were used specifically to power hyperdrive engines, such as the ultra-efficient coaxium and Clouzon-36.
Some types of fuel were used to create lightning, either through their ignition in lanterns or by powering lamps. Those included bloggin-oil, harvested from the bloggin of Jakku and Neehwa oil.
Some exotic types of fuel were used to power highly specialized devices. Those were accelerite and Conflagrine-14, both highly flammable and used in flamethrowers, hydro-glycolic fuel, used to power astromech droids, and paralene, used to power jetpacks.