Yes, you can use engine oil on a cycle chain, but it is generally not recommended due to several drawbacks.
While it might seem like a convenient substitute, using engine oil on your bicycle chain can lead to increased maintenance and potentially reduced component lifespan. The primary reason against its use stems from its formulation and viscosity, which are designed for internal combustion engines, not exposed bicycle drivetrains.
Why Engine Oil Isn't Ideal for Cycle Chains
As stated on February 9, 2022, regarding the use of engine oil on a bicycle chain: "Yes you can but it is not recommended. Engine oil is very thick and it will attract more dust particles which will increase the frequency of chain cleaning and servicing of your bicycle."
This highlights the main issues:
- High Viscosity: Engine oils are formulated to withstand high temperatures and pressures within an engine, often making them thicker than ideal for bicycle chains. While this thickness provides robust lubrication under extreme conditions, it's counterproductive for an exposed bicycle chain.
- Dust and Grime Attraction: A thicker lubricant like engine oil creates a sticky surface on the chain that readily attracts and holds onto dust, dirt, sand, and other road grime. This gritty mixture acts as an abrasive paste, accelerating wear on:
- The chain links
- Cassette cogs
- Chainrings
- Derailleur pulleys
- Increased Maintenance: The rapid accumulation of dirt means you'll need to clean and re-lubricate your chain much more frequently. This translates to more time spent on maintenance and a higher consumption of cleaning products.
- Reduced Efficiency: A gritty, gunked-up chain experiences more friction, which can slightly reduce pedaling efficiency and make your drivetrain feel less smooth.
- Messiness: Thicker oils are more prone to flinging off the chain onto your frame, wheels, or even your clothing, making for a messier ride.
The Benefits of Dedicated Bike Chain Lube
In contrast, dedicated bicycle chain lubes are specifically formulated for the unique demands of a bike chain:
- Optimal Viscosity: They are designed to penetrate chain rollers effectively and provide lubrication without being excessively thick.
- Dirt Repellency: Many modern bike lubes (especially 'dry' lubes) are designed to dry to a non-tacky finish, resisting dirt attraction. Even 'wet' lubes are formulated to shed dirt more effectively than engine oil.
- Longevity and Protection: They offer excellent protection against wear and corrosion, extending the life of your drivetrain components.
- Application-Specific: Available in various types (wet, dry, wax-based) to suit different riding conditions and preferences.
- Cleaner Operation: They result in a cleaner chain, reducing the need for frequent deep cleaning and minimizing mess.
Practical Recommendations
While engine oil might work in a pinch for a short period, for the longevity and smooth operation of your bicycle's drivetrain, investing in a proper bike chain lubricant is always the best choice.
- Choose the Right Lube: Select a chain lube appropriate for your riding conditions (e.g., wet lube for rainy, muddy conditions; dry lube for dusty, dry conditions; wax-based for maximum cleanliness).
- Clean Before Lubricating: Always clean your chain thoroughly before applying new lubricant to prevent grinding old dirt into the moving parts.
- Apply Sparingly: Apply a small drop to each roller, pedal backward a few revolutions to distribute, then wipe off excess with a clean rag. Less is often more.
