2.0er 100kw with ethanol-mixture

moin, did any of you experiment with ethanol? I would be interested in how much I can contribute without changing the motor/controller. to take the wind out of the sails from the opponent: of course, all this is at your own risk and everyone must know what he is doing. therefore, please do not have any basic discussions and unresolved assumptions. nor about the fact that in 3rd world countries people have to starve because fuel is being grown! I am interested in it technically and I would only mix ethanol, which remains as a waste “other” for local farmers.