Generally it is a 10/30 or 10/40 oil.
2 stroke oil
a half of quart 2 stroke .....2 stroke oil mixes with the gas only!!! use automatic transmission fluid type f for your gear oil..DO NOT USE 2 STROKE OIL FOR GEAR OIL!!!!
four stroke motorcycle oil .
Use a quality 2 cycle oil only. I recommend you use a synthetic 2 stroke oil.
I use 80 weight gear oil.
10w30 four stroke motorcycle oil. do not use car or truck oil!
Use 10w40 4-stroke motorcycle oil. DO NOT use any type of automotive oil; motorcycle oil is needed because of the wet clutch.
If it is a 2 stroke use 80/90. Weight gear oil. If its 4 stroke run what specified on the engine
Depends on the manufacturer as to what type and weight oil to use.
trochoid
It is possible to use 4-stroke oil in a 2-stroke engine in an emergency situation. You should not use this oil in the long term as it will damage the engine.
Lawn mowers can take 2 stroke or 4 stroke oil depending on the type of engine. If unsure contact your lawn mower provider.