Jim,
At 16:1 isn't that like 6.25% oil? Have you run any of your sparkers on alcohol/menthol and oil, what oil, what %?
Dan.
I assume the reason for the original question was to either lower cost or availability of the oil. Doing a Google search on 2 stroke oils shows lots of options for racing, chainsaws etc. These engines don't use the oil as part of the cooling system the way we do. Because of this many of the 2 stroke oil options, even the one's that mix with alcohol/menthol, aren't suitable at the mix ratio they recommend. Maybe some of the oils that mix with alcohol/menthol at our normal 25% ish range will work but not sure if there is any cost savings.
Best, DennisT