yeah.
thats why i use 98 from one chain of petrol stations.
im glad E85 is regulated (from Nov 2012) but when United are only supposed to tell you the ethanol content, i was surprised that United wont tell you the RON rating. and when the ethanol content is down to 70% during winter months, I wonder what the RON would be then? for safety you would want a flex fuel meter guiding the ECU to make sure the mixtures are consistent with the fuel (at least i would anyway)
im not bagging the fuel, just playing devils advocate because its not for everyones budget or application.