I usually run at least 89 octane and get around 140 miles before reserve, but lately have been running 93 octane and got 160, 180 and last fill up 191 miles before reserve. Has anyone else experienced such a drastic difference ? I think the compression ratio on these engines is around 10.5:1, which would negate the need for 93, but wow !

2005 Model . Two Fast Eddy stickers , a bell and a clock . She's Lola . She tinkles and keeps time . http://s649.photobucket.com/albums/uu211/britbike05/