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[QUOTE]gordo2000 - 5/5/2013  7:01 AM

Do NOT break it in how you are going to drive it, that is not the correct way to break in an engine.  Every single moving part in an internal combustion engine has to seat properly during the break-in process.  This is obtained by varying the rpm range for short periods of time under normal load.  low rpms are not bad, and neither are high rpms, just don't do either for extended periods of time.  When the engine is new, it will actually deposit very small fragments of metal into the oil and the filter.  Valves, valve seats, camshafts, crank bearings, rod bearings, pistons, piston rings, wrist pins, push rods, lifters, all have specific tolerances.  Improper break-in will compromise those tolerances, and lead to poor performance, poor fuel mileage, possible oil consumption, and shorter engine life.  I would, and do change oil and filter after the first 1,000 miles to purge the oil sump of any contaminants.  I always use conventional oil during the first 10,000 miles, because synthetic oil doesn't allow proper seating for new engines.[/QUOTE]

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gordo2000

Posted 5/5/2013 7:01 AM (#639247 - in reply to #639001)
Subject: Re: Truck Break in Period

Posts: 58

Do NOT break it in how you are going to drive it, that is not the correct way to break in an engine. Every single moving part in an internal combustion engine has to seat properly during the break-in process. This is obtained by varying the rpm range for short periods of time under normal load. low rpms are not bad, and neither are high rpms, just don't do either for extended periods of time. When the engine is new, it will actually deposit very small fragments of metal into the oil and the filter. Valves, valve seats, camshafts, crank bearings, rod bearings, pistons, piston rings, wrist pins, push rods, lifters, all have specific tolerances. Improper break-in will compromise those tolerances, and lead to poor performance, poor fuel mileage, possible oil consumption, and shorter engine life. I would, and do change oil and filter after the first 1,000 miles to purge the oil sump of any contaminants. I always use conventional oil during the first 10,000 miles, because synthetic oil doesn't allow proper seating for new engines.