What is the Difference Between Grease Lubrication and Oil Lubrication?

[ConnorDella]

Grease lubrication and oil lubrication differ in terms of adhesion, temperature range, and pressure resistance. Adhesion Difference: When the friction part is in a static state, grease lubrication can maintain its original shape without being lost due to gravity, nor will it slide off vertical surfaces or leak through gaps. In contrast, oil lubrication cannot maintain its original shape and will directly flow away. Temperature Range Difference: The operating temperature range of grease lubrication is wider than that of oil lubrication. For example, general lithium-based grease can be used in a range of -20 to 120 degrees Celsius, while oil lubrication has a much narrower usable temperature range. Pressure Resistance Difference: Grease lubrication has a much stronger adsorption capacity on metal surfaces compared to lubricating oil, forming a relatively robust oil film that can withstand higher working loads. This is due to the large amount of polar substances contained in grease lubrication.

[VonEmiliano]

Grease lubrication is somewhat like paste-like butter, being more viscous and less prone to flowing or leaking. It is suitable for well-sealed automotive components such as bearings or wheel hubs, as it can stay in place for a long time with minimal maintenance and remains stable in low-speed, heavy-load, or high-temperature environments. Oil lubrication, like engine oil or gear oil, has strong fluidity and can penetrate into high-speed moving parts such as engines or transmissions. It helps dissipate heat and clean impurities through a circulation system but requires regular replacement to prevent degradation. The core difference between the two lies in viscosity: grease is superior when sealing against leaks and long-term durability are needed but performs poorly in heat dissipation for high-speed scenarios; oil is suitable for applications requiring efficient cooling and flow but is more cumbersome to manage. In automobiles, many modern vehicles use grease lubrication for front wheel bearings to reduce leakage, while engine oil lubrication ensures efficient operation. I recommend car owners consult their manuals to avoid misuse, as incorrect choices may increase friction and wear.

[SanColton]

In my daily driving experience, the difference between grease lubrication and oil lubrication is quite significant. Grease is used for parts that don't move much or bear little force, such as door hinges or chassis bearings. Its viscosity helps seal out dust and moisture, and it only needs replenishing every few years, saving both money and hassle. Oil lubrication is applied to frequently moving components like the engine internals, relying on its fluidity to transfer heat and remove contaminants, but requires oil changes every few thousand kilometers to prevent clogging. Simply put, grease is like clingy butter that coats parts to prevent rust, while oil flows like water through pipes to dissipate heat. In vehicles, SUV rear axles often use grease lubrication for durability, while car engines rely entirely on oil lubrication to maintain efficiency. During maintenance, choose based on location: use grease for sealed, stationary parts and oil for open, moving ones. Choosing the wrong type can lead to overheating or noise issues.

[OAubree]

The main differences between grease lubrication and oil lubrication lie in viscosity and application. Grease has a high consistency, similar to an ointment, and is used in sealed automotive components like wheel hubs, providing long-term protection without leakage. Oil, being a liquid, circulates within engines or transmissions to dissipate heat and clean. From a maintenance perspective, grease is more user-friendly, requiring less frequent replacement, while oil needs to be changed every 6 months. Avoid mixing them improperly to prevent insufficient lubrication and component damage.