I bought my 2016 CTX DCT new in the fall of 2017. I now have 8600 miles on the bike, so I average 2000-2200 miles a year. I have had the oil changed or changed it myself each fall now for the past four years (plus the 600 mile oil change). I will keep on the annual schedule because it's not that difficult and I don't mind doing it myself. So, my question is really hypothetical: Is it really necessary to change the oil at 12 months with 2000 miles? Here in Missouri we have several good riding days (greater than 50 degrees) even in the winter, so the bike rarely goes more than a few weeks without getting ridden. I have a couple of other vehicles (old truck and boat) that are used maybe two or three times a year and I'm in the habit of changing engine oil on them yearly as well. Good preventative maintenance or a waste of oil?