monofuel

/ˈmɑnoʊˌfjuəl/
noun
  1. A single type of fuel used to power an engine or system, especially in contexts where multiple fuels could be used.
    • The new rocket engine was designed to run on monofuel for simplicity.
    • Many military vehicles are switching to monofuel to reduce supply chain complexity.
    • The generator operates on monofuel, so we only need to stock one type of gasoline.