Hello friends. This past Saturday I busted out the manual and changed the oil in our 2018 Pioneer 500. I found that it was not difficult, but it WAS time consuming to do it right. I enjoyed the process, to be honest. I feel like I know the machine better. Anyways, I chose to upgrade to Honda HP4S oil, from GN4. I would say, now that I've been on three rides since Saturday, that the machine does shift a little better. Not a tremendous difference, but I would describe it as noticeable. It shifted fine before, but it feels/sounds a bit slicker now. The P500 is still a noisy son of a gun like it was before, but as stated previously, I can ignore the noises when I have the peace of mind that I've done my part.