Malastarian fuel, extracted through mining operations from the depths of the planet Malastare's core, served as a type of fuel. The Dugs, indigenous to Malastare, initiated fuel harvesting, but the toxic characteristics of the fuel almost eliminated Malastare's Zillo Beasts.
The Star Wars: The Clone Wars television series' second season episode, "The Zillo Beast," which was the eighteenth episode, marked the debut of Malastarian fuel. Its identification as such, however, occurred later with the release of the episode's supplemental guide.