Quote Originally Posted by PJZajkowski View Post
I think you misunderstand. There are thousands of certified airplanes such as older Bonanzas, Skyhawks, Skylanes, etc that are certified for 80 octane fuel. These would benefit from omitting the lead in the fuel by using UL94.
Not quite as simple as that. They were certified for 80 octane LEADED fuel. IIRC, the lead acts as a lubricant on valve guides, etc. 100 "Low Lead" fuel has four times the lead as the old 80 octane, which for many engines, is too much of a good thing.

I run my C85 on unleaded car gas in the summer, but switch to 100LL in the fall due to gas-stability issues. It seems to handle the mixed diet.

Ron Wanttaja