Gas/oil mix ratio

I'm a little confused on what oil mixture to use after break in. Forum member deacon and a few other places have suggested a 32:1 but most places I see, say a ratio of 16:1.

A lot of things people do are just out of preference, but those are two opposites ends of the spectrum. Which one is correct?

I'm using 20:1 right now, but once I get my engine broken in I'll need to switch.

I've never measured an exact amount I just pore gas in and add a lil 2-stroke oil.
most people around here will say 32:1 and that's about what I try to guesstimate with my mix.

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For the record, I'm running one of those 49cc China motors if it makes a difference (those directions say to use 16:1)

My understanding is that the 16:1 number comes from the days of using regular 30 weight automotive oil in the mix. Which might still be the practice in China. Using 2-cycle oil the recommended starting mixture is 20:1. Where you go from there depends on who you talk to. Everybody seems to have their own idea of the best mix. There is also debate over using synthetic vs. fossil oil for break in. There seems to be a belief that using fossil oil will cause the engine to wear in better/faster. I am still in the break in phase so I am using 20:1 Valvoline. I haven't decided yet where to go from there. Good luck!

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Well ignoring the chinese directions won't be a problem for me, they were pretty much useless/wrong anyway so it doesn't surprise me they would be outdated on an oil mixture.

I just started the engine up for the first time on Saturday so I have plenty of break-in left. After that I guess I'll just mix up some 32:1

I run 24:1 synthetic with the china motor. 32 or 40:1 for a weed whacker type.

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I run 25:1 with semi synth oil
Peace

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A note to clear some things up-
Too much oil will cause carbon build up fairly quickly IF YOU USE NON-SYNTHETIC OIL.
The directions say 16 or 20 to one as stated above because that would be using automotive 30 wt. from the 60's.... The newer oils are far and away better than anything from even 10 years ago.

40 or 50 to 1 may be to lean even with good synthetic due to horrible loose/uneven tolerances in the wristpin and bottom end.

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If it ain't broke, and you mess with it long enough, it will be.