I do not worry about the alchohol in the fuel.
I do always add a little sea foam to my spare fuel cans though. Ever since doing that I have not had to clean a single carburetor on anything. From my motocross bike to a weed wacker and everything in-between.
I do buy ethanol free fuel when I am out west as my vehicle gets better MPG with it. That makes sense of course as there is more energy in a mol of gasoline than there is in ethanol.
The one benifit of ethanol is that it allows water and gasoline to mix. That's also a bad thing as it is hydroscopic and absorbs moisture at all times. If you want to make your own ethanol free fuel to save a huge amount of money over buying it special that way, just pour water into your gasoline and shake the crap out of it. What will happen is the alchohol and water will mix until the water dilutes the alchohol so much it can no longer mix with the gas. They will then separate as normal. The gasloline will float on top of the water ready to be separated however you wish. You can do this an ounce at a time in a flask to find how much ethanol is in your particular fuel.
calls for ethanol free premium fuel according to who branded it here in the USA. However they based this on a misconception that it seems most Americans have; that "premium" fuel means better. It is not a quality grade, but a measurment and catagory based on octane content.
The compression ratio of your engine is the only thing that determines if you need higher octane or not. Octane is a retardant that raises the flash point of the fuel to slow ts burn and prevent detonation and pinging. If your vehicle or engine is running nice without pinging knocking or otherwise detonating, you do NOT need "premium" fuel. If your engine is not pinging on 87 octane standard fuel and you switch to higher octane fuel anyway you will actually lose power and MPG by essentially retarding the timing of your engine.
The people who branded my generator
also say to over fill the crank case with oil. Not in words of course but they tell you to fill it with 350ml even though it is overfilled at 300. *face palm* Their obvious idea is to avoid damage and return claims by overdoing it in the instructions. In both cases they are wrong.
My 800 watt max 750 watt continuous generator holds a solid 800 watt output for as long as I want on regular fuel. Even e15. This means that if I listened to the suggestion to use premium I would very likely NOT be able to do that as it really couldn't run better than it does now.
A lot of people report only getting about 730 watts constant from theirs. I bet they put "premium" in it.