Europe is the same, E10 fuel.
This bio **** indeed washes down the piston rings contaminating the oil also.
The carb indeed needs to be enriched as you require more fuel.
The attack on rubbers and seals is the most "known" fact to the crowd.
I just went trough it at work to run our main engines on B20 bio diesel, short story is we would require to add biocide to the fuel storage tanks to avoid microbiological growth, add a fuel improver to avoid getting issues with blocked fuel filters and fuel injectors and increase oil sampling to monitor the fuel contamination in the oil and maybe increase the oil change interval.
So you are adding a **** load of chemicals and likely use more lubrication oil as this can no longer be used on the current 1000 hour interval.
And what i read about this bio fuel is that: They add up to 10% ethanol (so 5-10%) in the E10 petrol, and bear in mind this
also creates emission gasses, same as normal petrol.
But, the average engines consume op to 3-7% more fuel due to the ethanol.
So what the f*ck is so "green" about it? That we are using 5-10% less hydrocarbon based fuel?
It is the same marketing trick as that you need to pay extra for CO2 compensation, so after you paid extra for your bus/plane/boat ticket the engine of a car/plane/boat discharges less CO2?
We are being fooled and someone is making some serious money on this.
The environment? Remains same.
My car is as "green" as it gets, Sublime Green!!