It depends on the type of race car you are talking about. For example:
- NASCAR engines burn 110-octane leaded gasoline.
- Indy cars burn pure methanol (a.k.a. wood alcohol, CH3OH).
- Top Fuel dragsters and funny cars burn nitromethane (CH3NO2).
These links will help you learn more:
- How NASCAR Race Cars Work
- How Champ Cars Work
- How Car Engines Work
- How Gasoline Works
- What does octane mean?
- What is "top fuel," and how is it different from gasoline?
- How can I measure the drag on a car?
- Methanol Fuels Indy Race Cars and Cleaner Air
- Everything you ever wanted to know about racing fuel
- 110 Leaded Racing Gasoline
- The basics of Drag Racing