"Full" Break-in doesn't occur until about 20,000 miles, depending on the break-in conditions (described at length and with much zeal above). That is the time on the engine that the seals will be the tightest and therefore the engine its most efficient. We Ecomodders are just looking to extend the "tightness" of the engine as long as possible.
I knew a lady that NEVER changed her oil in her cars, EVER. Not since she got it. She would always trade them in before 100K miles, because the thing was "not the same as when I got it". I told her that doing regular maintenance was important and she just kept doing the same thing she always had. Some people you just can't reach.
I on the other hand, would rather be safe than sorry.
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American by right ![Thumbs up](/forum/images/smilies/grinning-smiley-003.gif)
Ecomodder by choice ![Turtle](/forum/images/smilies/turtle.gif)
Hypermiler by necessity
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