I use Klotz Benol at 32:1, never changed it from 32:1. Even during break in, my engine has been running great for 3 years now without a problem. When I grew up we still didn't mix the gas to rich during the break in on the dirt bikes. IMO, it's an unnecessary waste of oil. Just for the first few tanks don't beat the sh!t out of the bike and the rings should seal fine. You could go leaner for more power like 40:1 or even 50:1 after the rings seal, but it seems like 32:1 keeps the engine running longer after you get it jetted properly.
You have to find your comfort zone. But, as stated, 16:1 is way too much oil for these engines (they were designed in less advanced areas of the world that may not have access to the high grade lubricants available here).
Broke mine in at 32:1. Have been running 50:1 for 4 years now --- same Echo oil/gas mix I use in my weed whacker, which is starting its 12th season.
I use plain old 2 stroke oil 4 oz to the gallon. 32/1
I don't see much smoke at all, and I like the smell.
I tried the opti 100/1 deal and it didn't blend with my gas right or something, nearly seized my engine going around the block.
That expensive stuff is still out there on the shelf, I use it for assembly and any other way I can find, just not in my gas.
16/1 was for peasants running 30 weight motor oil in Asia.
I like the Briggs and Stratton two stroke oil. Ashless, low smoke, low smell, low mess, plus their 32oz bottles have an easy measure chamber at the top, so all you have to do is squeeze the bottle and you get your oil measurement. I'm currently running almost 50:1, which is perfect for all around use. I broke my engine in at about 24:1.
I was running 24/1 per instructions from the motor guy I got it from, but the plug was getting slimed with too much oil.
At 32/1 it doesn't, the engine gets plenty of lube, runs cool and shows no signs of wear.
The old school 2 stroke oil is also cheaper. Cheap engine, cheap oil, cheap everthang for the win.
If your air/fuel mixture is off by just a hair, it can be adjusted by changing the oil content. A little too rich? Add more oil.
Too lean? A bit less oil.
The added oil displaces gasoline through the jet.
I use Pennzoil 2 stroke boat motor oil in all of my engines and have never had a problem. It's cheap by the gallon, it smokes very little and it burns completely. If only I had the same luck with gasohol.
If it aint smoking, it's broken.
Been using Walmart brand full synthetic 2 cycle oil from the get go, 20 to 1 mix the first 100 mile, and 32 to 1 thereafter. The machine runs excellent with very little smoke, plug color is perfect and the top of my piston is acceptably clean. I'm sold on this setup.