I live in PA (not sure this makes much difference). I have been trying to buy ethanol-free gas for my lawn appliances, with mixed success. Have both two cycle and four cycle engines. Lawn tractor and walk-behind mower #1 are four cycle, while weed whacker and walk-behind mower #2 are two cycle. Two questions:

1) If I cannot find ethanol-free gas, it it worth bothering with treatments that supposedly deal with ethanol? Which one is good?

2) Are service stations required to post the fact that their gas has ethanol? The station I stopped at yesterday was Sunoco, and did not have any ethanol content signs posted. This same brand contains ethanol at nearly every other station I have stopped at.