Thread: New engine break in procedure

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I ran across an unusual (to me) procedure for breaking in a new engine and it leads me to a few questions.

First, what do you think of this procedure:
http://www.mototuneusa.com/break_in_secrets.htm

and last, if you disagree (or agree), what method do you recommend for breaking in a new engine.

Thanks,
Sean

I have had 5 brand new cars and all have been run in under similar conditions to the site.

I had 2 SS Commodores (GM Holden) with Gen III engines. Both left the dealership sideways, and I never had any problems with them, even though a lot of people had oil consumption problems from mild to excessive usage. I never needed to top the oil up.

I have always been of the opinion that the engine needs to warm up with no load ie 1 to 2 minutes of idling, before you go anywhere. Stay at reasonable revs until the engine is at operating temperature.

Once the thermostat opens give it gas. All of my cars have have operated at high rpm early on in life. I am carefull not to place the engine under shock loading until everything has a chance to bed in, ie slamming through the gears etc. Be sensible they are built to be tough but are not invincible.

As I said no problems engine wise at all. You also have to give them a good run every now and then, clean out all carbon etc.

I agree with JL350, no "shock loads" on a fresh engine. The best mechanic I ever knew always said to break 'em in the way you plan to drive 'em. Just show a little mercy for the first day or so, don't scream or lug them, and warm it up easy.