If any kind of fire touches Oil, including the player's own weapons, the Oil will ignite and function identically to Spikes. However, certain water-based assets will douse the flames and return them to normal.
Oil limits the player's jump height when jumping out of it, to about one tile above the oil itself. This applies even if it is above the player when jumping.
- Oil also appeared in Mega Man Powered Up, albiet with drastically different behavior.