IMHO Ethanol in fuel is nothing more than filler. I have seen it eat rubber hoses (in older Morgans) and destroy small engines, and gas tanks. I use ethanol free fuel in all my Morgans and lawn mover. Sta Bil has a 360 product in the US that is supposed to address the gas tank deterioration, above the fuel level.

Cheers,

Mark

1934 SS MX4
1938 Series 1 DHC
1951 Plus 4
2005 Roadster