The Zippo lighter uses a specialized fuel known as Zippo lighter fluid. This fuel is a highly volatile mixture of isopropyl alcohol and denatured alcohol, which is a mixture of ethanol and methanol. The combination of these alcohols provides the necessary volatility and ignition properties for the lighter to function effectively. The use of this specific fuel is due to its high flash point and low ignition temperature, which allows for easy lighting and consistent flame performance.

The choice of Zippo lighter fluid is based on several factors. Firstly, the fuel must be highly volatile to ensure that it can be easily ignited by the spark from the lighter's flint wheel. Secondly, the fuel must have a high flash point to prevent accidental ignition when the lighter is not in use. Lastly, the fuel must be safe for use in the Zippo lighter's design, which includes a fuel reservoir and a wick system.

According to data from Zippo Manufacturing Company, the lighter fluid is designed to provide a consistent flame that is both hot and long-lasting. The fuel's volatility allows for a quick and reliable ignition, while its high flash point ensures that the flame will not easily extinguish. Additionally, the fuel's low ignition temperature means that it can be lit even in cold weather conditions.

The use of Zippo lighter fluid is also advantageous due to its availability and ease of use. The fuel is widely available at most convenience stores and tobacco shops, making it convenient for users to purchase and refill their lighters. Furthermore, the fuel is relatively safe when used as directed, although it should be kept away from open flames and sources of ignition to prevent accidents.

In conclusion, the Zippo lighter uses a specialized fuel known as Zippo lighter fluid, which is a mixture of isopropyl alcohol and denatured alcohol. This fuel is chosen for its volatility, high flash point, and low ignition temperature, which contribute to the lighter's reliable and consistent flame performance. The availability and safety of the fuel also make it a practical choice for Zippo lighter users.