Mobil 1 sythetic....but I NEVER ran 10w 30....I always run 5w. But I guess cause I live in the south and dont need a heavier wait oil. And I ALWAYS ran Royal Purple in my 05 and when I got my 07 I put it in there...and when I changed my oil it seem to be "worn" and yes I know because we have had this talk before You cant tell by looking if oil is "worn" BLAH BLAH BLAH! But when I have used it for over a year I kinda have a idea of what it SHOULD look like. But everyone likes different things! Maybe I just got a bad batch or something. But Autozone,Advance Autoparts and O'reillys should carry it!
