I think the ethanol "problems" are way overhyped in the vintage vehicle hobby, 'urban myths' rattle around endlessly .... the trouble with old rubber formulations is they've been sitting on the shelf for decades, and the trouble with the gas 'going bad' is so many folks don't actually use the vehicles, any gas is volatile and undergoes changes when left sitting for extended periods .... I've been using E10/15 since it first appeared locally, with no problems - some folks have been
using it much longer 
Bill
