I agree but one more thing to think about
There are no standards on how long each engine breaks in at or to say seat the rings.One engine might take 3 gallons another 7 gallons.If all we are doing is taking out the microscopic metal pieces that need to be say--- rounded off.Then you should be able to do that in the first 2 gallons of fuel. Piston rings are made to expand with use and wear so by using a petro based oil you in turn after say 3,4,5 gallons are theoretically doing nothing but wearing down cylinder and rings. Petroleum based oils do not help in seating the rings but in turn force to seal piston and rings. Synthetic oils are not 100% wear proof and will aid in the process of seating rings also. One thing petro oil does or has is additives that create soot to help in the wearing process,by using regular oil the soot creates/takes up space between rings and piston wall constantly wearing down even after microscopic hairs break down and the piston walls and rings become smooth.
Why not from the start use synthetic oil as once the microscopic hairs wear,either 2 to 10 gallons of fuel the full protection that synthetic creates is already there. Only one other thing, If your using petroleum based 2 cycle oil to break in your motor how do you honestly know when it is broken in without really testing compression, heat temps, and consistant rpm's during and after each and every tank of fuel. Now if your engine was actually seated nicely at say 3 gallons of fuel and you have already put through 10 gallons you inadvertently have put 7 gallons of excessive wear through your motor and lessened the life of your rings because they just stretch out to meet piston walls.If you would have used synthetic from the start the break in procedure might have taken 4 or 5 gallons but once the surface was smooth and rings were seated the full protectiong of the synthetic would already be there,in turn taking the guessing factor completely away and fully protecting the engine immediately when it was ready instead of when you were ready.

This is my thoughts on synthetic oil being used for break in.Not the only way!! but one that I have used to much much success.


TerryF