While I'm not an expert on motor oil, I did a fair amount of research before I switched to Rotella 6 on my FJ-09 and found that most of this was being generated by folks who aren't exactly experts in motor oil. Most people who have way more experience than I say that it is safe, and many use it on their bikes. I have been using Rotella 6 on my FJ-09 for a while and find it better than the YamaLube, but as always, your mileage may vary......