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I did a lot of reading up on this subject when I was frequently breaking in motorcycle engines. From the information I read, engines need heat cycles, and varying loads in order to break in properly. So they need to reach full operating temps, and be driven in changing conditions ( rpm, throttle, accelerating, engine braking ).
Also, most people were in agreement that the initial oil should be changed after the 'break in' period expires, even if thats before the first official service.
Ive always followed those procedures with cars as well, and none of my cars or bikes experienced oil usage, and my bikes usually made above normal HP when dyno'd.
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