Not to start an another oil thread...just a heads up.
I like good stuff and good prices. Came across this on Amazon today...6 quarts for $36...Now, I haven't tried Castrol, but for $6/qt I'm willing to give it a try and see how it does.
https://www.amazon.com/Castrol-Power1-10W-40-Synthetic-Motorcycle/dp/B008MISDH4