Mine got build for E10 (2012 Model)
(see tank sticker, below)
Aviation fuel still has lead
Airplanes with use of gasoline are not always young.
Same problem you have with antique cars.
And a logistic problem: They never know, if and how many show up, on this airport. How much would you stock?
And in the end: Ethanol Fuel contains (can contain) more water, as normal fuel.
How cold can it get, up there? Even on a sunny day?
Btw: What is with the ban on marine fuel?
You know, in case, there is injection on a bike, there is almost no reason, to believe, it can't use E10.
And if it can't, the manufacturer will tell you, to fill only with the good stuff! But not put a sticker on the tank, or an 'up to E10' in the manual
You know, in Thailand they almost stopped No-E fuel.
Sometimes, you can't even get it on stations, pricing it.
With a carb bike, it was really challenging, in the past, sometimes.
In the end, you (I) went for some E5 V-Power, with lots of additives.
Plus some 2 stroke oil, sometimes, in the tank
Silently they changed the E from 5 to 10, there, too
(Silently for me, minimum ;-)
But I'm with you! In Malaysia, the only E10, till now, is the New Pantai Expressway (afaik
And I was pretty happy, with the 97, I got there.
Even my consumption went noticeable down, about 0.2-0.3l/100km.
That's about 10%. And I add for about 500 or 1000 km, before I check on this.
But part of that is probably the 97, instead of 'only' 95.
But my point here is, the CBR250R is build for E10.
As long the E10 means, up to 10% Ethanol, and not minimum 10% Ethanol in, I think, there is no risk!