Crossword clues for the word: OILTANK The word OILTANK has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for OILTANK Showing 1 to 6 of 6 results Clue(s) Basement item. Furnace adjunct Furnace feeder Home fuel holder Home holder of 275 gallons Part of a home heating system