Out of curiosity did you do regular oil changes for the first 40-60k miles? In my experience once the engine is broken in there's little harm in changing oil only as needed. I've gone 60k between oil changes before. As long as the oil in the engine isn't filthy I just top it to meet levels. Never had any problems.
I didn't, I did feel guilty about it, well until the mechanic said it was in great condition. I mean maybe when I first bought it I did a few I don't remember...but I seriously can't recall specifics about more that four times—two of which were when my mom was visiting an saw I was like 20k past the window decal from the last oil change.
