My personal favorite is Red Line 2 stroke oil.
I don't run gas pump gas ...... I use Coleman or Crown camp light fuel ( it doesn't stink when you haul your boats in a car and doesn't eat up your diaphragm seal in the carb :D ).
Alex
Steve
To make your life easier.
Take a 2 gallon cherry can (gas can). It is easier to mix the fuel.
I use a 2 gallon can .... poor 1 gallon of gas or Coleman/Crown camp light fuel in it and add your 10 ounces of oil.
So you don't have to distract 10 ounces of gas each time to add the 10 ounces...
Kris
I use in all my .21 motors a OD 287 plug.
It’s a variety of OS outboard , OPS DAC outboard, CMB Beta, Novarossi and even Picco P5 . All my motors like this plug .
Just FYI
Alex