I went out today to find some butane for my new Iolite. I know everyone says to use Vector but I couldn’t find any and didnt want to pay shipping that costs more than the product, so I settled for King and Zippo Premium. Well, King and most other Butane lists how many times the product has been refined, for King 3x but Zippo….nothing. So I decided to call the company. After calling I was put on hold (of course) and then she picks up and says we are not allowed to discuss that information with you we can only say its "pure". This leaves me to believe that it is crap. If anyone else has had experience using it please let me know, or if you have any other info dont be afraid to share it.