you should have done the break-in while it was still a weadeater

any cheap oil for air-cooled two-strokes will do. 32:1 or whatever the oil bottle says.

i think most people use an 18x6 on the ryobi. years ago i ran the 28cc ryobi with a 16x8...

you don't really need to break it in before flying. just get the needles sorted out and run it a little rich. a tach will help a lot.


dave