It could cause problems with seals in the fuel delivery.
It is also hygroscopic which means it absorbs water.
In reality you'll see the same problems that "E" blends create.

__________________
http://i19.photobucket.com/albums/b1...c/GOWIDE-1.jpg
1971 280SL ROADSTER
1988 300CE TWIN TURBO WIDEBODY
1994 E320 CABRIOLET
1999 C43 AMG
2005 G55K AMG
2008 CLK63 AMG BLACK SERIES