I have used Royal Purple in my honda since i had it about 4+ years ago. Sold the car, and got the MS3. And bought royal purple for the weight i needed ect. But i was looking on Bobistheoilguy.com, or people refering to it, sayign that they think Royal purple is a bad oil, for reasons i cant remeber as i cant find where i was reading it from. But they went on to calin Mobile1 is one of the best oils out there. Is that true? Have i been paying more for RP and it really be a bad oil?