I was buying Walmart Rotella T6 Synthetic, but then my local Walmart stopped carrying it, so I was buying it from Checker, but they changed their name to Reilly (Reilly bought Checker a few years back, and they are just getting around to changing the signs). So I guess I have Reilly Shell Rotella T6 Synthetic.
Dunno if that's better than Kragen T6 or not...
All kidding aside, I'm VERY happy with this oil. Smooth shifts, and no issues I'm aware of. 5w when it's cold means it distributes more quickly through the engine, and builds up to a decent viscosity (40) as it warms. Plus, I like it when my mechanic friend teases me about putting Truck oil in a bike...