I purchased Oregon Only One 2 cycle oil at Do It Best Hardware in Indiana it came in a 1.8 ketchup kinda pouch.
2 Cycle Engine Oil Opti l & ll By Oregon
I called Opti 2 and he said it was the same. I am going to use it in my 66cc motor as soon as it warms up and get it completed.
If you can't find Opti 2 look for the Oregon oil.