The manual says not to keep the car at a steady speed or something like that. Yesterday I the guy at the dealer and I did a test drive of my car, and getting on the freeway he just steped on all the way, I was like

DUDE, what are you doing???? It only has 650 miles on it..His awnser was: Ohh don't worry, this engines come way overprotected....All I know is: That sucker is not touching my car anymore

. There are different ways, I can't tell which one is safe. There is this one :
http://www.mototuneusa.com/break_in_secrets.htm, the original manual, this one:
http://www.enginesonly.com/break-in.html, and this one too:
http://www.faqfarm.com/Q/How_should_you_'break-in'_a_new_car, me personally until yestarday follow the manual.