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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Oily hydrocarbon. 6 letters:

XYLENE: Oily hydrocarbon.
OCTANE: Oily hydrocarbon in petroleum.
INDENE: Oily hydrocarbon
OCTANE: An oily hydrocarbon
CETANE: Oily hydrocarbon in petroleum