I switched to Rotella 6T when I changed my oil last week. I can't tell any difference so far. I'm hoping for less oil use 'cause the syn oil may not break down as quickly. But in reality, it will probably burn just as much oil regardless of what I use. We shall see.
It was interesting that, immediately after the change to Rotella 6T, and going for a ride, I could not change into neutral with the engine off after parking the bike. I always like to start the engine with the bike in neutral to prevent the dreaded lurch, but with Rotella 6T, the bike won't change into neutral with engine off. This may change as I put more miles on. Now have 16,000 miles on the bike; all except the last 50 miles using Kawasaki dino 10w40 oil.
"Chet from Chattanooga"
2009 KLR, blue