Re: oil change (quickdraw)
Ducs come from the factory with synthetic oil, so I'm not sure what the dealer told you. I do know that they sort of run them in at the factory, but they really only run them the equivalent of about 5 miles or so. I don't know that it's enough mileage to get the rings to properly seat, but I don't see that there would be much of a point in switching to mineral oils after the initial factory "break-in" and then back to synthetics after 600 miles. I've run synthetics in mine since new and don't have a problem. That being said, I've never had the cylinder sleeves off so I couldn't tell you much about blow-by from doing so.
As far as what oil to use, you'll get as many different opinions as replies to this post. There was a big discussion a few months ago so try doing a search. I used to use redline synthetic, but got tired of paying $10/quart. I switched to Mobil1 20/50 a while ago, partially due to the fact that I got those Pep Boys coupons making it about $2/quart, and have noticed that it actually shifts smoother than when I was using the Redline. I've always used the K&N filters, they have good filtration (claimed) and a drilled nut integrated into the bottom so you can safety wire them (if you want), and can remove with a socket. I recently saw that Mobil1 has a filter that will fit the Duc, but it wasn't in stock when I last changed the oil, so I couldn't comment on fitment/effectiveness/etc.
I think you'll get good performance out of any fully synthetic, provided you use the correct weight, and any quality filter will do the job. There are other filters that you can use, do a search and you'll find them. The only one I can remember off the top of my head is the Fram G2. I'd be careful about cheaper filters though, I'm a firm believer that you get what you pay for. I've had bad things happen with Fram filters in my truck and vowed never to use them again, but I'm sure you'll find people who swear by them. A big part of it all is simply personal preference.
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