Bought a 2 pack of Ronsons in 2021. One crapped out after 2 months, and the other lasted 2+ years before the ignition failed. Would buy again.
Used to only buy Xikar premium high altitude butane to protect my precious lighters. Got suspicious when guys at the shpo said the different DuPont butanes were the same but with unique nozzles. Now I buy the cheapest butane my local bodega or smoke shop sells, usually $5-6 for a big can. No issues, and I can’t taste a difference (although the gas itself is a bit stinkier).