Ethanol does attract moisture even while in the tank and gas can. For cars it's not a real problem as it doesn't just sit there in the tank for long periods. We're constantly driving and put new gas in. For mowers and weedeaters it's a diff story as the gas sits. It also attacks the rubber seals and fuels lines which are not the same grade as what's used in cars. For you lawn gear you can get ethanol sheild to mix in your gas at your local Home Depot.
Hatch Nation #9
"2 by 2 Hands of Blue."