"It's fuel for a lighter."
The Lighter Oil (ライターオイル raitā oiru ) is a key item in Resident Evil 3: Nemesis
This item can be found in the basement at the Y-shaped alley.
The fuel used in the games' lighters is correctly stated to be "fluid" in the first Resident Evil game, but it's wrongly called "oil" in every subsequent game it's mentioned.
- BIOHAZARD 3 LAST ESCAPE OFFICIAL GUIDEBOOK. Famitsu. 1999.