I sorted it out for ME7.9.10, so not really 1.8T, but still... How exactly is described here:
http://nefariousmotorsports.com/forum/index.php?topic=14417.0title=I don't have it in use at the moment at all, because E85 in my country is expensive relative to regular 95/98, and for me economy was more than 50% of the exercise.