I put an oiler on at ~700 miles. I'm at 17,000 now and have adjusted the chain exactly once. I will probably get 35K out of this chain.
I do run it slightly wet; the tech guys at Pro Oiler (what I have) recommended a 20-3 setting. I run a 20-4 setting, meaning about 4-5% more oil than they figured for my region (Ventura County, CA). Yes, it gets a bit more grimey down there, but the chain is in great shape for 17K of HARD miles (lots of twisties, lots of 8% to 10% grades, and 350 pounds of rider and gear).