Thumper Talkers, I just got my 13 DRZ-SM two weeks ago and I love it. It isn't my first thumper...or bike. I had a few DR's over the past 15 years and several 70's I-4's, twins, and a 90's XL; but, this is by far the most reliable (and first brand new) I've ever rode. My wife wanted me to have something newer and fun to ride around and it was between the DRZSM and a Triumph Speed Triple. Living in Chicago, having 2 kids, and not being able to ride anywhere or anytime I feel like makes me happy I chose the SM. It's way more fun to ride around the city... Speed Triple would've been a waste of money. Anyways, I'd like you guys to weigh in on something. I've been breaking the motor in hard.... Lots of loading up, rapid decel, varying RPM's. 150 miles and I'd like to change the oil. The general consensus, I've noticed, is to use a good ester-based synthetic; but, at what mileage should I use that?? Should I use conventional oil until the "factory's 600 mile break-in," or switch to synthetic sooner. Fire Away... and thanks!! Also: any SM'ers who ride around Chicago--Give a shout. Super Motard night somewhere would be more fun than the typical Thruxton / Dyna-glide nights I usually see around.