You can get Valvoline motorcycle oil almost anywhere, Mobile 1 as well. Wal-Mart, Autozone, etc.
Otherwise, send Bob a PM. You'll be surprised at what prices he'll quote ya. (look for Amsoil Dealer Group on the forum). If I remember right, he beat wal-mart prices on Valvoline Synthetic 10-40 for Amsoil 10W-40.
If you're wanting the dirt cheapest, then, that'll be the rotella conventional. Make sure whatever you buy has at LEAST the JASO MA rating. Though I'd really recommend going with a motorcycle specific oil, but it's your bike, your money!
"8 But God demonstrates his own love for us in this: While we were still sinners, Christ died for us."
Romans 5:8 (NIV)
2014 Kawasaki Vulcan 1700 Vaquero ABS SE
iPod Connector Kit, Kuryakyn Highway Pegs, Mustang Touring Seat, Marvella's Hitch, Kuryakyn Trailer Wiring Kit, Haul-Master Tag-a-Long Cargo Trailer
2011 Honda Shadow Aero 750 (Wife's)
Memphis shades quick-release windshield, OEM Solo Seat, Mustang Fender Bib, Chrome Solo Luggage Rack
Past: 2006 Vulcan 900 Classic LT