People overthink this way too much. You shouldn't be flogging the hell out of it, but you'll be fine no matter what you do. If the engine has major issues, it's gonna happen before the warranty expires...hopefully.

I always break 'em in like I'm gonna drive 'em - spirited but not thrashing it. No WOT for the first 1-2k miles, but, other than that, nothing special. I'll do the first oil/filter change at 2k miles or so; sooner if the oil gets to looking dirty.

My first engine was using a quart of oil at 500 miles.

My second engine rebuilt in eleven days locally, was broken in by the book. Worst 1200 miles ever.

GTR motors are put to test before it's installed to make it's at it best and no failures. Which means they run it hard from 0 miles. You can watch Life of GTR on youtube. They explain why they run it hard at zero miles. what you hear isn't 4K RPMS on that GTR, your hear the rev limiter bouncing on freshly built off the factory floor/line GTR. Main reason why they beat on it? So you can drive it like it should when you get it.

Break in periods, oh please.

Drove my 13 WRX hard from 6 miles, as I already know the mechanic who tested this car already beat on it. My Z, same thing. :driving:

It's in the sales brochure "Once assembled , the engine spends an hour in bench testing and break-in, including running at redline for a rigorous 10 minutes straight making it ready to give full performance when the GT-R is delivered to it's owner".

I believe in hard break-ins for all my vehicles once they are up to operating temp.

$.02 YMMV :cool:

There seems to be different opinions on the break in period subject.
I guess I can only practice common sense and somewhat follow what Nissan recommend.
With that said, I only got 400 miles on my Z, and redlined it once by accident��
Call me a fool, but I totally forgot about the traction control button. Trust me, it will be off tomorrow.

Yeah my daughter's Civic just got a new block, damn thing was leaking out the water jacket on the side of the engine! Her driving is normal girl driving back and forth to work, so she's just going to drive it.

Unluckily mine was already broken in by previous owner at 1500 miles, I guess mine is effed up. Who cares.. I dont care anymore.. I just want pictures ..LOL :roflpuke2:

Break It In!
 

My new one has 1428 miles on it . Tomorrow, I'm going out, on 96 and do 120!
Cheers