The isue is not ehtanol, it is the amount of ethanol. When they first started adding ethanol [and even recently] to marine fuels, a large number of machines with plastic fuel tanks and system parts found themselves with a plastic gunk in the induction system. This was primarily as a result of the fuel interacting with the plastic an then breaking down when it reached the warm precincts of the engine. There have been quite a few articles written about this phenomenon in the marine industry journals.

My niece's car, a SAAB, had a sudden gas tank leak in her boyfriend's garage. When they called the police, the car was removed from the road and towed to a garage where the tank had to be replaced.

The SAAB was an 80's model built in Sweden before the GM takeover.

Another one of my vehicles had an explicit warning not to use E-fuel, as it would attack the fuel system.

Does Sweden use E fuel? If so, when did the change go into effect?