On the one hand, the manufacturer, in view of some design features, recommends pouring more oil. And on the other hand, the oil manufacturer says that it should be poured less.
So, for example, I have a 25k1 ratio written on a chainsaw, and a 50k1 ratio on a bottle with oil. So, when I burned a liter of gasoline with a ratio of 25K1, rings on the piston dipped in me, a lot of soot formed, the piston had to be disassembled and cleaned. There was also a case when the entire muffler clogged the burnout.
So I decided for myself to choose a ratio as indicated in oil. After all, oils come in different compositions and you need to follow this indicator as well. And how are you?
By the way, it worked somehow, using ordinary motor mineral oil, the tool works perfectly. True, I do not know how this affects with prolonged use.