I broke in my engine with 2cy synth and it runs fine.heres some oil to gas mixing ratios,
16:1 = 8oz oil to 1 gallon of gas
25:1 = 5oz oil to 1 gallon of gas
32:1 = 4oz oil to 1 gallon of gas
40:1 = 3.2oz oil to 1 gallon of gas
50:1 = 2.5oz oil to 1 gallon of gas

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