I'm using pro pattern 20/20 in my 4 strokes. It has 20% oil and 20% nitro. You will need to set the high end needle with a tach about 300 rpm below peak. I'm running a 15/4W on a Funtana. If you get a 4 stroke lean it will have a tendency to spit the prop at you!

Check out the glow engine discussion forum for addtional information.

EXCAP232