there is much more to breaking in an engine than mileage
1. idle the engine for a good two hours using DINO oil, do NOT run synthetic at first
2. change the oil, again with dino
3. fire up the car and take it out on the road, performing pulls basically like the following:
(x5-6 times)
--0-30, staying under 4k rpms
--30-0 using brakes with clutch disengaged
(mix in a harder pull like this on occasion)
--0-50, staying under 5k rpms
--50-0 with clutch disengaged
(x2-3 times)
--0-60, staying under 4k rpms
--60-0 with clutch engaged
4. change the oil, again with dino
5. cruise around at around 30-40 without going over 4k rpms for around 200 miles....do not brake with clutch engaged
6. change your oil, again with dino
7. go for another 300 miles, staying under 4k rpms around 30-40 and braking without clutch engaged....however, mix in the occassional pull to 60 up to around 5k rpms
8. change the oil, using dino...you should be at around 500 miles on the car now
9. run the car to 1500 miles like that, stay under 4k for most of the time and mix in occassional hard pulls to 60 up to 5-6k rpms...it's key to mix in some hard pulls, just not super often, if you baby the engine too much you won't seat your piston rings properly
10. change your oil, you can run synthetic now....don't push it too hard until you get to 3k rpms, but you can push it a little more
you don't gotta stick to that regiment perfectly, it's just a guideline to follow....everyone will have a different oppinion on this matter too