ethanol in gas bad for our cars?

In my view, boat owners have problems similar to what we car collectors face- a car or boat can sit for months in storage and we need to worry about fuel degradation. Older cars like my 1967 have vented fuel systems, just like boats, so water accumulation in gasoline is a problem that daily driver cars just don't see.

Over in the marine engine community, we've seen lots of gas additive formulation changes in the past 10 years to deal with the problems E10 fuel has caused there. Gas additives for automotive applications seem to have changed little if at all. I use a marine fuel stabilizer in all my non-daily-driver fuel. I've been involved in active discussions about marine fuel treatment for about 10 years and I don't ever recall hearing anyone talk about treating gasoline with MMO for marine use.