There is an STC for mogas use in some Cessnas like 152, 172 not for 182 and 206. I asked for it for our 152 Aerobat at my local flying club, and it`s just filling and comply with some paperwork, add some decals, to have the stc. I was impressed there was not,any mechanical work or add on item to have it, and it is limited for certain type of engines.
I know one 206, a 310R and a B-55 Baron , that had been flying with mogas for more than two years, without any problem (as long as I know). They say there is not vapor lock risk in places like the tropics, were the outside temperature is very hot all year round.
Regards,
Jose L. Ichaso
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