2-cycle oil in most cases can be used as long as it is used in a 2-cycle motor. The answer to your question is NO, you cannot use 2 cycle oil in any engine. Only use 2 cycle oil, in a 2 cycle engine.
Use exactly what the manufacture of the equipment you are using recommends. I know that Echo recommends 89 octane in their 2 cycle engines. Some may recommend 87. Read the owners manual that came with the equipment.
Use 4 cycle oil if the engine is a 4 cycle engine. Use 2 cycle if it is a 2 cycle. Use the weight oil recommended by the manufacture of your ATV.
If you mean 4 cycle oil in a 2 cycle bike, the answer is no. Use only 2 cycle oil in a 2 cycle motorcycle.
No, absolutely not. You must use 4 cycle oil. 2 cycle oil is only used in a 2 cycle engine mixed with the fuel.
If you mean 4 cycle oil for 2 cycle use, the answer is NO.
You can not use 4-cycle oil in a 2-cycle engine because the four cycle oil will not mix it is not designed to.Two cycle oil is designed to mix with fule to lube the two cycle parts in your motor.
2 cycle oil if it is a 2 cycle. SAE 10w30 if it is a 4 cycle.
If it is a 2 cycle where you mix the oil with the gasoline then use 2 cycle marine oil. If it is a 4 cycle then use the weight recommended by Evinrude.
if 4-cycle-Use Valvoline 10W-30 oil if 2-cycle-use ryobi or any other brand of 2-cycle oil
If it is a 2 cycle engine, no, you must use 2 cycle oil. If it is a 4 cycle then use exactly what the manufacture recommends.
I don't know the science behind their chemistries, but personally I would not use 2 cycle oil in a 4 cycle engine. 4 cycle oil is cheap enough, use the right stuff.