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Message: <blockquote data-quote="driftingmustang" data-source="post: 1000035" data-attributes="member: 9799">its not short term you will be concerned about, oil is about the long term. there are other ratings as well around the world so google what would be the equavalent to a minimum of API SM. API being american petroleum institute and SM being the rating. lower grade oil isnt something youll see effects now, youll see it at 40,000, 80,000 100,000 miles. blah blah blah etc. I say drive like that for 100 miles or so just to be on the safe side. according to my teacher 10 miles (in ideal conditions) or so is good enough though. ring seat is pretty fast. honestly, have fun playing with it when you get your motor back in the car and dont over think it too much or worry about it. just get it near your redline and let it come back down. hypotheticly if you do everything wrong and drive the first hundred miles at constant rpms it wont break your motor and youll lose horsepower you would probaly barely notice if you drove an identical car broken in on ideal conditions.</blockquote>