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2. X-ring chain - Wikipedia

   en.wikipedia.org/wiki/X-ring_chain

   Like the O-ring chain it has sealing rings which keep the contaminant (dirt) out, and lubricant in between the pins and bushings. This is known as internal lubrication. However, unlike O-ring chain, it has X-shaped seal which does not experience increased surface area (which is in contact with the chain plates) when under pressure.

3. O-ring chain - Wikipedia

   en.wikipedia.org/wiki/O-ring_chain

   The o-ring chain is named for the rubber o-rings built into the space between the outside link plate and the inside roller link plates. Chain manufacturers began to include this feature in 1971 after the application was invented by Joseph Montano while working for Whitney Chain of Hartford, Connecticut.

4. Motor oil - Wikipedia

   en.wikipedia.org/wiki/Motor_oil

   Motor oil, engine oil, or engine lubricant is any one of various substances used for the lubrication of internal combustion engines. They typically consist of base oils enhanced with various additives, particularly antiwear additives , detergents, dispersants , and, for multi-grade oils, viscosity index improvers .

5. Roller chain - Wikipedia

   en.wikipedia.org/wiki/Roller_chain

   Roller chain and sprocket The sketch of roller chain, Leonardo da Vinci, Codex Atlanticus. Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles.

6. Self-lubricating chain - Wikipedia

   en.wikipedia.org/wiki/Self-lubricating_chain

   Because of these advancements, the self-lubrication style chains achieved strength on par with regular roller chain, with the added benefit of being lube-free. [ citation needed ] Powdered metal sintered bearings (in the case of roller chain, the bushes) are self-lubricating because their porosity is impregnated with lubricants during the ...

7. Oil additive - Wikipedia

   en.wikipedia.org/wiki/Oil_additive

   Oil additives are vital for the proper lubrication and prolonged use of motor oil in modern internal combustion engines.Without many of these, the oil would become contaminated, break down, leak out, or not properly protect engine parts at all operating temperatures.