In a different forum, not related specifically to engines, the following was stated,

 

"...Rotary is different issue. Their unusual combustion chamber requires them
to mix 2 cycle oil with each tank. If they don't their compression seals
die prematurely. Just like your boat motor mix, I don't see it as a big
deal. In addition, if they use aviation fuel, they develop power drop on
departure and have to replace all their plugs before next flight. This
happens every 20 hours. They don't have solution for this."

What is the experience that you are having? Is there any truth to this. If not true, where might this info have come from??

 

thanks,

Rich