UH,,,10:1 is 10%......20:1 is 5%
ORIGINAL: acam37
The experts in this area recommend a 10:1 gas oil ratio which I believe is about 20% oil. I tried this ratio, but could not get my engine to run. It kept fouling my little 1/4 X 32 plug. Lowered the oil and the engine came alive, then quickly died. I hope Ken can save this engine for me. I think the rod bushing and pin are the only damage.