Sorry Crash I wasn't paying close enough attention to your actual question.
I can't see how it would make enough difference to be worth while.
Most all of the big manufacturers are now recommending 100:1. They must feel there is little to no difference.
ORIGINAL: Crash90
Why do people feel that 50:1 oil will offer more protection to an improperly tuned engine than a 100:1 mixture? Don't take this out of context. I am asking this question with sincerity.