I have a lot of different lighters...Xikar, ST Dupont, Ronsons, etc. and it seems each one has it's own personality as to what it works best with butane wise. As others have talked about Ronsons can almost run on anything...Xikars IMO need a premium brand like Vector or other 5X refined fuel. About 4 years ago I bought the big cans of Vector with the CI free shipping code and have only gone through one can of 4....never have had an issue with this fuel.
Some of the lighters tend to have different size nozzles which can make refills a PIA so know your lighters before refilling. I wasn't sure of the shelf life of butanes but so far after all this time the fuel works like gold.