During the last summer i was used pure E85 (85percent of ethanol),
until the morning temperatures started to fall under 7*C.
At first I was experimented with E85 and petrol mixture. Until the E85 percentage was lower than 30%
the factory injectors and the closed loop mixture control was able to compensate the decreased caloric content.
I felt better throttle response at the low end.
Later I was changed to pure E85, and replaced the injectors with uprated ones. I had no problems with this setup, until the first colder mornings arrived. Under 7*C the factory cold enrichment is inadequate, causing
hard startups. The top speed was slightly reduced to approx 185km/h. The exhaust emissions were dropped.
The average fuel consumption with pure E85 was increased by 30%. The rubber sections of the fuel system
seem to be unaffected, no cracks, no rigidness problems.
Here in Hungary the Ethanol was a good alternative of the regular petrol, until our nice government
put extra taxes on it.