There are only 3 countries in the world that still have widespread use of leaded fuel. The US isn't one of them. I'm not sure where you get gas in Milwaukee, but I can assure you none of it is leaded.
For my 2 stroke engines, I get AV100 gas at one of the small air fields locally. AV100 gas is 100 octane aviation gas and it is leaded and has no EtOH.
I would call the small air fields in your area if looking for non EtOH gas
Might be a good idea to change out the CS muffler if it is one that has a catalytic converter if burning leaded fuel.
