The Zippo lighter uses a specific type of fuel oil to ignite its flame. This oil is a blend of naphtha and isoparaffin, which is a mixture of paraffin hydrocarbons. The combination of these ingredients provides a high volatility, allowing the lighter to produce a consistent flame. This blend is chosen for its ability to ignite quickly and maintain a stable flame, which is crucial for the reliable performance of the Zippo lighter. According to Zippo's official specifications, the fuel oil is designed to be safe for use in their lighters and is formulated to provide a long-lasting flame. The use of this specific blend ensures that the lighter operates efficiently and effectively, making it a popular choice among users worldwide.