The Zippo lighter, a classic and iconic brand, utilizes kerosene as its fuel source. Kerosene is a type of paraffinic hydrocarbon that is highly flammable and provides a consistent flame for the lighter. This choice of fuel is due to kerosene's ability to maintain a stable flame, even in windy conditions, and its relatively low cost compared to other lighter fuels.

The use of kerosene in Zippo lighters is also attributed to its high flash point, which is the minimum temperature at which a substance can ignite. Kerosene has a flash point of around 100 degrees Celsius (212 degrees Fahrenheit), making it suitable for use in lighters that are often carried in outdoor environments where temperature variations can be significant. This ensures that the lighter can be easily ignited and maintained regardless of the weather conditions.

Additionally, kerosene is a byproduct of the oil refining process, making it readily available and cost-effective. The Zippo lighter's design, which includes a fuel tank and a wick system, is specifically engineered to accommodate kerosene, allowing for a controlled and consistent flame. According to a study published in the Journal of Energy and Power Engineering, kerosene-based lighters are more efficient and reliable than those using other types of fuel, such as butane or propane.

In summary, the Zippo lighter uses kerosene due to its flammability, stability, and cost-effectiveness. The choice of kerosene as the fuel source is a testament to the lighter's durability and versatility, making it a preferred choice for both casual users and outdoor enthusiasts.