This subject has been driving me crazy trying to find out which component's areat risk, suffice to say I'll use the expensive E5 as it runs better anyway. That said this is an interesting read https://www.hagerty.co.uk/articles/...ut-using-e10-fuel-with-your-classic-car/

They have two recommendations for additives one for Cats and one without. I have ordered a bottle of the Lucas oiljust in case I get caught out and have to swallow E10 for a tank or so.

Silver Morgan +8 " The Duchess"
'69 Triumph Bonneville

Life is a journey, best traveled in a Morgan