the 1000 and the 1100 take 3.4 qts. of oil with filter change. i dump in 3 qts and top off using the remainder. watch the sight glass. also , put on center stand when changing and filling , checking level.
I've used Rotella t, Delo 400, Delvac 1300, and Walmart 15/40 and 20/50 wt. Why don't I use a motorcycle specific oil? The owners manual doen't call for it. It says to use an SAE 10/40 wt oil. It doesn't say anything about using motorcycle oil, and you know what ? they were right. My bikes almost 30 years old and not too many things you buy these days last that long, and still perform like they should.