I've got a '05 Subaru Impreza WRX with around 700 miles on it. The first recommended oil change is at 3750, but I had planned on doing a change with 5w30 regular oil at 1000 miles then to Mobil 1 5w30 at the 3750 mark. My reasoning behind this was to get rid of all of the shavings in the oil from the 1000 mile "break-in" period rather than leaving them in for the remainder of the 3750 miles. Well, I found this forum and started reading and found that some manufacturers claim they put specially formulated oil for the break-in period and you should not drain it before their specified mileage. I also found more than a few posts from conspiracy theorists claiming that that’s just because of EPA regulations and the ability to advertise less maintenance. Usually these same people recommended a first oil change at 2-500 miles. So, should I change my oil at 1000 miles? Should I do the Mobil 1 at 1000 miles, or just plain 5w30? I haven't seen any claims by Subaru that their factory fill oil is anything special. Has anyone seen different?