Question: can 3 in 1 oil be used on bike chains?
Answer: 3. Lubricate it. There are a variety of lubricants on the market in spray and bottle form, with specific formulas for wet and dry conditions. Using WD40 or 3-in-1 oil may seem pudent but it won't things running smoothly and will cause dirt and grime to stick to the chain and prematurely wear.