[rashannon81]

PSA:

Your dealer will tell you "Non-M cars don't have a break in period"

They're either dumb or misinformed.. or both...

EVERY engine has a break in.

I've built quite a few engines and I'm a bit OCD when it comes to break in.

IMO, here's my ideal break-in procedure:

Start car, let warm for 30s-1m, drive in manual mode trying to stay out of boost and not maintaining the same RPM(staying below 4k RPM) for any length of time and engine break as much as possible.
Do this for around 5-10 miles.

Same as before, but go to 4500-5000 RPM and use 5-10 psi. Engine brake as much as possible.

At 50 miles, change the oil and leave the filter.

Repeat again but go to 5000-5500 rpm and don't be afraid to give it the beans. Still engine break, it's crucial for the rings to seat properly.

At 50 miles or so the engine is about half way through, the remaining half will take another 1k miles. (Think bell curve for "break in value @ XX miles)

Change oil AND filter at 250 miles. And again at 1k miles.

The oil changes may seem like overkill, but when you drain it at 50 miles and see the amount of metal shavings you'll be glad you did.

I hope I can inform some people that are misinformed from the "experts"