Below are the results, without editorializing, of my recent fluid changes on my '07 SuperGlide. She is stock, with O.E.M everything mechanical. The only changes were intended to improve comfort or utility. The lovely wife refers to her as the "Harlot". The oil is Spectro 20W-50 Golden 4. This is a "synthetic petroleum blend" per the label and this is the oil I used in the Harlot since the 5k service. The local price is $7.99/liter and $30.96/four liter. Drained the oil through a cone paint filter, from Lowe's @ 99¢/four, with no deposits of any kind on the filter. The magnetic drain plug was clean and the oil itself was a dark honey color. Also changed the filter, use the HD one exclusively at each oil change. I sent a sample to Blackstone Labs for analysis, which came back favorable. It might be hard to read but the phosphorus reading was 1396 vs 1058 average, and the zinc was 1750 vs 1354 average. The oil had 4,346 miles over four months on it, through the Arizona desert summer, and I did not need to add any oil during this time. The primary oil had 9,020 miles on it and was the Spectro Primary, cost $7.50/quart. It came out very dark but no debris in the paint filter. The magnetic drain plug had four or five tiny steel whiskers. I looked at the tensioner as best as I could and did not see any discoloration or scrape marks. I adjusted the clutch per instructions on this site. The transmission had 19,523 miles on the Spectro 75W-140 synthetic GL-5 six speed oil. The drain plug had a small (1/2") glob of brown gunk attached; looked like a water and oil condensate. The fluid itself looked brand new, red and clear, and with no deposits on the filter. The price is $16.11. The spark plugs had the same mileage as the tranny oil and were change out. The air filter looked OK but was changed out. Blackstone suggested the silicone reading was slightly high, possibly due to a dirty filter, or more likely from a silicone product (sealer?). Regards. Looks like I'll be keeping her.