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Most of things Ive read on hear apply to a 100% brand-new engines, IE a full custom built engine and if your the one WHO BUILT IT. the production engine in passenger cars are started at the factory for checks and major problems, as for "break-in" for passenger cars follow the OM. Most if not all engine building companies now a days break-in the motor on a dyno. Also note, HIGH PROFORMANCE AND RACING ENGINES, not production engine, for the special break-in AMSOIL shows
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