bunch of pussies!! Fine with me, shit pumps slow as fuck as it is.. i've never had to mess with my tune, if they do switch it to e70 (winter blend) the car just runs slightly richer and compesates for the tenth of a point of octane reducution.. There is very little difference in octane from e50 and up.
http://delphi.com/pdf/techpapers/2010-01-0619.pdf
-Carl