I have used Rotella 5-40 for years, when I tried the new formulation in my '91 Katana 1100, after 100 miles, shifting was notchy and clutch operation was rough. I reported this on another forum and rotella zealots said rotella was fine, I need to tear down my tranny.
I replaced the oil with Maxima Ultra 0-40 synthetic (real pao/ester syn, not the fake group III crap) and bike runs great. In the year I have had the oil in there, did a few 600 miles trips, bike runs and shifts great for an old war horse.
I replaced the Rotella 5-40 in my C14 with Maxima, driven it only 80 miles since then (changed it two months ago) just got back from a near month of vacation traveling, will take her out today...