I changed the ff in my 08 corolla at 300 miles, again at 500 miles, 1600 miles and started my 5K (or 6K intervals) after that.
have run dino and synthetic, but probably going to stick with synthetic as i have quite a bit but it wouldnt phase me in the least to run a dino 5K intervals the life of the car, which I am hoping to be at least 400K