I'm definately not wanting to change my oil every 3k, I just want to get the break in oil out of there (and whatever it may be carrying) and put in some good mobile one. I realize the break in oil isn't "breaking down" or anything, but I've always changed the initial break in oil out pretty soon (the initial break in doesn't take that long), plus I'm hoping for a slight mpg improvement from the mobile 1 full synthetic.