Can you refill a lighter with any lighter fluid?

It is not recommended to use any type of lighter fluid other than the one specified for your lighter, as different types of fluid can have different compositions and may not work properly or even damage your lighter. For example, butane lighters require butane fuel, whereas gasoline lighters require lighter fluid that is specifically designed for use with gasoline lighters.

What kind of fluid do you use to refill a lighter?

The type of fluid used to refill a lighter depends on the type of lighter. Butane is the most common fuel used for refillable lighters, such as torch lighters, jet flame lighters, and some types of cigar lighters. Zippo lighters, on the other hand, use lighter fluid or naphtha as a fuel.