We want our generators to work when we need them. Using gasoline blended with ethanol should only be used in cars that are driven often AND have fuel systems that don’t breath. If you have a vented gas tank, you should expect trouble, and might see it the first day.
Here’s two websites you should consider book marking.
lots of really good information. Unless you are sure you can get a supply of straight gas now and in the future, you should rule out gasoline generators period! (unless you don’t need your generator to run when you try starting it.)