Engine break in.......................................

I couldn't resist getting on it in my titan when I first bought it. I didn't run it -hard- but yeah. The only thing that the manual specified was not to go over a certain rpm before 300miles, then another until 1000, or something along those lines. For the most part I stuck to it, but I'm not gonna lie… I did a few 6k runs on the engine during that time. Whatever works though!

Interesting, that is basically the feedback I got from the guy I had rebuild my heads and a local high performance engine builder.

Warm it up good, let it idle a bit high (1K) for about 10 minutes and then go drive it hard for about 15 minutes, but don't thrash it. Take it up to about 75% of red-line a few times for short periods as you are driving. Go home and then let it idle and cool out for about 10-15 minutes. After that try to stay below about 75-80% (5500rpm)of red-line for a thousand miles and after that let her rip. :wink:

I have to say, I worked like a champ for me. After over 3500 miles with some hard driving mixed in the engine still has that tight new engine sound. (you know what I mean if you have heard it before).

One other thing. Both guys told me to use the best natural oil I could get. They both suggested Chevron Delo 400. (worked for me since my old man had been using it since I was a kid in all his equipment) Run that for 500 miles. Drain it, and flush it with 2 quarts of the same to get the wear junk out as best you can. Then choose a synthetic and stick with it. Change it after 2k and then you should be good for 5K+ from there on. I have used Schaffers for years and they both agreed that it was better than most so I stuck with it. Both guys were also fans of Redline oils as well.

That guys not greasy enough, he cannot be trusted! lol jk

Talk to enough people, and you will hear all kinds of ways to break in motors.

Yeah just build it and then drag it. Duh.