For years I had used a lesser brand of lighter fuel for my Zippo. It made it stink more, and the flame would fluctuate quite a bit, despite essentially "doing the job".
But really, I have just bought this - TWO official Zippo fuels for a really cheap price - and WHAT A DIFFERENCE. The flame burns perfectly, so clean, and much less of an odour. I don't know yet if it'll last longer, but it's a safe bet.
Years ago you could only really buy these things in town, now there's no excuse. Order it here!!