i will wait since you are on your breaking period what oil are u using like mine i am running 50:1 for my breaking and now i am running 100:1 i am using amsoil oil i was having the same problem but once i switch everything is fine now hopefully this helps
Sorry I have to do this, but I just don't know how to "read" the way a spark plug looks.
So waht do you think? Do I need to adjust anything?
I am the tech manager at Autolite spark plugs. Your plug actually looks very good for now. I would completely break it in. Then do a WOT run, chop the throttle closed and shut it off. Then you can really "read" the plug.
what percentage of throttle were you using for your 6 mile run?
What fuel were you using?
What was the air temperature at the time?
What was the level of humidity at the time?
What was your altitude at the time of the run?