A couple of comments:
1. because a manufacturer recommends a certain fluid for their smoke unit, it does not mean it's the best, but you can assume it at least does no damage to the unit.
2. many manufacturers actually do not manufacture their smoke units, and even more have stateside people who do not know squat about their own product.
3. I have heard a lot (and tested a lot) about different smoke units, but often many people commenting do not use their units much, i.e. really enough to know the long term effects of the fluid they use.
On the Aristo forum, several people went to great lengths to test and understand their "prime mover" smoke unit. We even measured the volume of the fluid chamber with and without wick. To this day, Aristo still does not have the right data on this (the chamber is 4.5 ml), and still no specs on how long it should smoke, and how to fix it if it does not.
Regards, Greg