I have around 15 engines that range from a couple of 2-stroke lawn/garden tools to 5 old garden tractors to a 1967 Corvette, some "regular" vehicles to the MH. The MH sits in a shed from November to April. I have used Stabil in the MH in the past but don't bother with all the small engines. All of the engines have E10 in them.
This winter, I saw the Stabil that I bought for the MH still on the shelf in the garage!!. It's still there and the MH started fine last month-------------just as all the small engines (as they always have) and the old Corvette (as it always does). So I wonder if it is really needed.
I know that a lot of people experience problems that seem to be fuel related---------------it makes me wonder if there are regional differences in the quality of the fuel. Most of my fuel is bought at Kwik-Trip and is supposedly "Top Tier" gas.