This thread has got me thinking. I decided that it would be worth it for my own knowledge to send some samples out to Blackstone labs and see what happens. I prepaid for 6 oil samples (I'm not made of money after all...). I normally run Maxima oil in my bikes, but I'm a firm believer in Rotella T for pretty much everything else. I just ran some Rotella T in my practice bike (YZ250F) for 2 hours and took the first sample when I changed my oil yesterday. I filled the bike up with some Yamalube for the next sample. After that I will run Rotella T6 for 2 hours for a sample, then the Maxima that I typically run for 2 hours. I will probably throw another oil in the mix since I will have some sample kits left over. I am curious to see how all of these oils compare in the same bike under the same riding conditions for the same length of time. It is going to take me a few weeks to get there, but I will post my results.