I should know better than to start an oil thread. I really, really should. But here goes.
I run Rotella T6 in everything else I own and am picking up a 2007 Gear Up over the weekend. I like it for my other bikes since it has no friction modifiers, is OK to use with a wet clutch and is motorcycle rated. I also run it in my diesel tractor, diesel pickup when I had one, and my gas cars. Never had an issue with any of them.
I know you're supposed to run a 50 weight (20W50) in warm weather, and that dino oils are OK. I have to wonder, is the difference between a 50 weight and 40 weight a problem in warm weather? Especially given the performance of the 40 weight synthetic. I know a lot of people run it in the winter. I'm hoping it's ok, first because I only have to keep one oil around, because I don't have to worry about timing my oil changes, and because it's a very affordable, quality synthetic, for about $22 a gallon.
So what's the consensus? I did quite a bit of searching on Rotella, but didn't find a firm answer.
eta, bike is used with about 18k miles, so no break-in issues.
2007 Gear Up
2012 Triumph Rocket III
2013 Triumph Tiger 800XC