On the of E10 fuel I have been around this stuff for nearly 20+ yrs. It does get a a lot bad reviews. For me the main problem with E10 and now the E15 is that the ethanol attracts moisture from the air easily. As long as it is keep in a seal container this resolves this problem. I had E10 in open top quart glass jar turn completely milky on high humidity day then the water settles out causing problems. It is also rough on rubbers that are not ethanol resistance. Some rubbers hardens and others soften.
I have been using it for years in all my equipment without a lot of the claimed problems as long as I use it up within a month or use fuel stabilizers. On my 2 cycle fuel mixes I use an synthetic oil that already has the stabilizers in it and of course keep the mix in a seal container. As pointed out you don't mix the fuel in the equipment fuel tank but in a separate container so it gets mix properly.
Just be aware that 4 cycle uses fuel only and 2 cycle uses fuel mix. There is one exception to the 4 cycle using straight fuel and that is the 4 cycle hybrid equipment that uses 2 cycle fuel mix. The two most common ones here is the Stihl 4 mix and Shindaiwa/Echo C4 equipment.
