My car has less than 300 miles on it and this weekend, I'm thinking of taking 5 adults in it to Napa Valley for the day - so that will include freeway and some winding road driving. Is that asking to much with 5 adults? (None of us are what you'd call large people - but still - adults.)

 

I'd make that trip without a second thought or worry.

http://www.ehow.com/how_5078961_break-new-engine.html

 

Vary the speed, do not drive at one speed for too long and do not push thr RPM above 5,000 for the first 600 miles is the advice I was given.

 

I believe there's actually a section in the manual on break-in, as well.