Our reader Zach sent in a link to MotoMan's suggested method for engine break-in, without hinting at the actual technique. My interest was piqued, so I headed on over, half-expecting the rantings of a wack-job. What I found was, well, the same technique that I've previously used with what I feel were good results. Distilled down to its most basic elements, it involves running the engine under high throttle and heavy load to properly seat the piston rings (which are the components that are most affected by break-in) to establish the proper cylinder sealing. Now, I will say this - modern mass-production piston ring materials are probably going to seat properly regardless of what technique is used, but I still think there's a lot of value to this technique. Those who disagree with it are welcome to do so, of course, since I'm not going to tell someone else how to perform break-in on a car I don't own. I think the fans of the slow-and-easy method would probably be somewhat shocked by what happens to a car before it even leaves the assembly line, though.
MotoMan's engine break-in tips
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