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Re: engine break-in oil
Posted to Educators Forum on 8/28/2023 15 Replies

So to get back to the start of the thread. What do the OEM do on new engines? Are they filled with break-in oil on the assembly line and then the first oil change you go to synthetic. Or do they lap the rings in during the assembly process and run synthetic ri... Login to read more.

15 Replies Received (View Replies)