I use my lighter mostly while camping. I picked up an adapter for the gas cans that I use with my stove and fill my lighter from them.
Primus is one of the brands, but I just noticed that Snow Peak uses a mixture of butane and LPG which they report works better at cold temperatures. I don't think this mixture has any effect on the lighter, but it is too early to tell for sure.
Prior to this I used Colibri, but the gas can adapter is more compact and weighs less than the refill can, so I just changed over.
Are there any issues with using stove fuel in a lighter?
I think that camp stove fuel is pretty pure. At any rate, none of my stoves have clogged up.
Tom