What is the typical fuel for a gas-powered go-kart?

The typical fuel for a gas-powered go-kart is gasoline.

Gasoline, also called petrol in many countries, powers the small internal-combustion engines used in many recreational and racing karts. Indoor rental karts often use compact four-stroke gasoline engines because they are durable, relatively simple to maintain and practical for repeated sessions.

Traditional racing karts may use either two-stroke or four-stroke gasoline engines. Two-strokes deliver high power for their size and have long been important in competitive karting, while four-strokes are common in rental fleets, training classes and lower-cost applications.

Gas-powered is an important qualifier: electric karts use batteries and an electric motor instead. Propane-powered karts exist in some commercial settings, and specialized fuels or oil mixtures may be used in competition, but diesel and ordinary propane are not the standard answer for a typical gas-powered kart.