Question: what type of fuel goes in a zippo?
Answer: butane, lighter fluid

In 2002, Zippo expanded its product line to include a variety of utility-style multi-purpose lighters, known as Zippo MPLs. This was followed in 2005 with the Outdoor Utility Lighter, known as the OUL. These lighters are fueled with butane. In August 2007, Zippo released a new butane lighter called the Zippo BLU.