In my tests (more than 6 months) with a chineese 140 glow engine i'm mixing 95 octane petrol with 6 % (six per cent) Motul 800 full shynt oil (esther type) with success. No wear on conrod. No wear on piston ring. For break-in i mix the oil in 10% (10:1) ratio. I have 3 engines of this manufacturer converted, two 140 and a 120 , same engine.
Start is a children play. Runs at full throttle without problem. And all of this with standard carb.

Easy start :
http://www.youtube.com/watch?v=1LwJdgpg4lg
Full throttle (8.600 rpm with 16x8 graupner prop) :
http://www.youtube.com/watch?v=xP9N0...eature=channel
Throttle Response:
http://www.youtube.com/watch?v=BTc71I9HO7o
Idle :
http://es.youtube.com/watch?v=a2CF3SFa_EU

More than 3 gallons of fuel oneach engine. I've tried XYZ and Rcexl CDI, CM-6 and 1/4*32 spark plugs. Many many hours .....

Regards