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International Automotive Technicians Network
Re: engine break-in oil
Posted to Educators Forum on 8/29/2023

JB, I think some of the grit had to get into the oil as well.

Bearings seem unhappy with that kind of "break in" IMO. Caterpillar found out it greatly reduced cylinder life (they said by around 33%). That was something they came out with in 1948!

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