- "Thank the maker! This oil bath is going to feel so good. I've got such a bad case of dust contamination, I can barely move!"
Oil baths, also known as lubrication baths, were a means of removing such things as dust, dirt, and various other forms of matter that collected in a droid's joints and sockets. Without treatment, the debris could cause the joints to become difficult to move or lock up altogether, a condition known as dust contamination.
The Great Heep was known to provide such a cleansing, along with other pleasantries, to unassuming droids before consuming them.
Luke Skywalker treated C-3PO to an oil bath on the Lars moisture farm after his uncle Owen Lars purchased the droid from Nebit's Jawa tribe. Due to his memory wipe in 19 BBY, C-3PO was unaware that he had been given an oil bath by a restless Padmé Amidala in the Lars garage when she needed a task to take her mind off Anakin's rescue of his mother. The bathing session had been much-needed, as the protocol droid had extensive amounts of sand and dirt lodged in his coverings.
- Star Wars: The Old Republic (Mentioned only)
- Darth Plagueis (Mentioned only)
- The Adjudicator Special Report: Tools of the Trade (Mentioned only)
- Star Wars Episode II: Attack of the Clones novelization
- Star Wars: The Clone Wars – "Evil Plans"
- Star Wars: The Clone Wars – "Missing in Action" (Mentioned only)
- Star Wars: Droids—"The Pirates of Tarnoonga"
- Star Wars: Droids—"The Great Heep"
- Star Wars Episode IV: A New Hope novelization (First appearance)
- Star Wars: Episode IV A New Hope
- R2-D2's Mission: A Little Hero's Journey
- Star Wars 12: Doomworld! (Mentioned only)
- Star Wars 13: Day of the Dragon Lords
- Traitor's Gambit
- Star Wars Galaxies
- Planet of the Mists
- Star Wars Missions 13: Prisoner of the Nikto Pirates
- Star Wars 47: Droid World (as lubrication bath)
- Star Wars 52: To Take The Tarkin (as lube bath)
- Star Wars 58: Sundown! (Mentioned only) (as lube bath)
- Fate of the Jedi: Conviction