I thought I had Heard Willie Nelson was running a 2005 on Bio alone but not sure of that. I was just wondering the prices are getting lower on the 2005 and 2006 might start looking after some extensive research.
I'm pretty sure the blue tech's can't be run on 100% bio so those would be the only years I would be interested in if they can handle bio.

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Moss Gate Bed & Breakfast
1985 300 TD GG done in by a red light runner
1984 300 CD Sold
2008 Titian
2000 Cadillac SLS
1966 FLH Sold
2003 Harley Ultra