E10 suddenly arrived at most of our local supermarket pumps about 2 weeks ago.
My engine is 2019, so there is no issue in using it.
My only concern is phase separation of the ethanol water content not binding to the fuel molecules over time. I probably use enough fuel in the summer for it not to be an issue, however, fuel usage in the winter is less certain, so some protection is needed.
One solution would be to use premium fuel which is still E5. The other solution is to use a fuel additive which stops phase separation, and also stops corrosion of pumps and injectors.
I have decided to go with E10 and use mercury quickstor fuel additive. The septics have had E10 for at least the last 10 years, so I will trust the American additive. Another additive that has a good reputation is Tech 4.
I know that @Clinker has always used quickstor in his 225, with good results, but I am not sure if Andrew also uses premium fuel.
So, what are you guys going to use to protect your fuel system ?