I have heard a richer oil mixture (40:1) burns hotter than a leaner mixture (50:1) because the oil burns hotter than the gas???
I thought it was BS , but the guy that told me that knows a lot about 2 strokes. I do not know for sure. I did get one of those spark plug temperature gauges but it does not fit so I am hooking it up to the exhaust pipe to get a relative idea.
Seems if the more oil mixture burned hotter it would whiten the plug and it does not in my experience. I always like to read the plug to determine what mixture is best---- Tooo black=too much oil and not hot enough,
Tooo white with the electrode missing= too little oil