One, the drip method. This method is widely popular for its simplicity and ease of use, as used motor oil is readily available and can be obtained immediately. Most users frequently and consistently adopt this method. Drawbacks: - The strong fluidity of the motor oil offers little lubrication to the chain's interior, and the oil tends to be shed off the chain as it operates at high speeds, leading to a dirty rear wheel and necessitating frequent reapplication.

The butter heating method involves using butter as the main ingredient, supplemented with machine oil (or molybdenum disulfide, paraffin, etc.). The mixture is heated together with the chain in a metal container, allowing the solid butter to liquefy and flow onto the friction surface of the flexible transmission. This method offers the advantage of better lubrication compared to machine oil, as butter has a stronger adhesion and is less likely to be shed, resulting in a longer maintenance cycle. However, the downside is that if the heat is not controlled properly after the butter is heated, the chain can easily ignite at high temperatures. Moreover, the hot oil coming into contact with clothing or skin will leave a particularly memorable sensation.

Three, it's the chain oil. Direct spray, simple and quick; no worries about being thrown out at high speeds, no fear of complex operations, and no risk of hot oil splashing on your hands. One purchase can last for years. The drawback is, it's hard to find; car enthusiasts in small towns have to go to the post office to order it by mail, and after paying, they still have to wait for the train to deliver the roller. Plus, scarcity makes it expensive; it costs dozens of dollars!

Four: The Graphite Method. This is a separate entry as it was not adopted below; instead, it was provided by a member on the forum. The method is similar to the second one, with the advantage of being long-lasting and dust-resistant, offering a dry lubrication. Just think about rolling your fingers over pencil shavings—it's a high-tech approach, and I encourage everyone to give it a try. The material is simply crushed battery carbon rods.