| Not sure for all the PFAS but Teflon (PTFE) is often added in “winter lube”. The "summer lube" have better performance, but they wash after some rain. Winter lubes tends to be slightly heavier (depends on brands), got additifs (PTFE and so) and last longuer under the rain but get eventually washed anyway. The performance is a bit worse but common mortals shouldn’t feel the difference. Most bikes I repair in the workshop craves for oil (poor performance) OR got way to much (sand stick in it and wear your chain). A best practice is to put 1 drop in every barrel (round stuff between two links) or 2, on the inner side of the chain only. That’s it. When the chain turns black the oil is dirty. Clean it (or swipe with a cloth, not great but way better than not cleaning at all) and apply new oil. Also: - belts are great, clean, silent and long lasting. But they require a frame with them in mind - avoid lube sprays!!! Or use supercarrefully with protections and so. People tends to (without wanting to) lube other parts that doesn’t need it: frame, derailleur, gears and wheel in the best case. Tire, brake rims and disk in the worst case (this is very bad). Lube bootles are cleaner, cheaper, smaller, last longer, fast (10 sec once you used to it) and easy to apply. I ride ~120km/week in dirty-oily Paris and swipe+oil my chain every two month on summer and one month in winter (probably slightly not enough). I use summer oil only because don’t want drop more PTFE on the road. Edit: how to know if your chain needs oil: it should look slightly shiny but not greasy, oily or dirty or matte. |