1) Decaf, facetiously 2) Decaf, jokingly 3) Filling choice 4) Gas-pump option 5) Lead-free 6) Leadless 7) Like better fuel 8) Nonleaded 9) Not treated with lead 10) Pump standard Found on https://www.crosswordclues.com/clue/unleaded
(of gasoline) containing no tetraethyllead; lead-free. · not separated or spaced with leads, as lines of type or printed matter. Found on https://www.infoplease.com/dictionary/unleaded