Quoted from jvivlemore:How come everyone says Naptha instead of Lighter Fluid if it's the same thing?
Because most lighter fluids (like Ronsonol) no longer contain Naphtha
I've read that 2017 was the cut off point, because Zippo bought Ronsonol a few years prior.
My old cans of Ronsonol still say "Contains Naphtha", but I've been refilling them for years...