Thread: break in on a rebuilt

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Two schools of thought on that subject. Some (like me) feel you should drain it right after the initial cam break in run. Others feel it is ok to go some longer period of time, like 500 miles, whatever. I don't know if one answer is better, and even the boat engine makers say the first oil change should come at 20 hours use. (that is the industry I worked in so it is my point of reference)

My thinking is that from the rebuild lots of metal shavings are floating around in the oil and the sooner you can get them out the better. I guess the oil filter should catch most of them, but I worry anyway. My philosophy has always been "oil is the cheapest thing you will ever put in your engine, so change it a lot."

Like I said, this might be overkill, but it can't hurt.

Don