The pour point of a lubricating oil is the lowest temperature at which the oil can flow. In order to lower the pour point and improve low temperature performance, the following methods can be considered:
- Use synthetic oil: Synthetic oil has better low-temperature performance compared with traditional oil. They have more uniform molecules and fewer impurities that can cause oils to thicken at low temperatures.
- Add a pour point depressant: Chemical additives called pour point depressants can be added to lubricating oil to lower its pour point. These additives help prevent the formation of waxy crystals that can hinder the flow of oil at low temperatures.
- Blending base oil: Blending base oils with different characteristics will help improve the low-temperature performance of lubricating oil. Mixing high and low pour point base oils creates an equilibrium mixture with a lower pour point.
- Heat the oil slowly: When cold oil is suddenly subjected to strong heat, the wax crystals in the oil will gather and thicken, causing the pour point to rise. To prevent this from happening, it is recommended to heat the oil slowly and gently.
- Insulating oil storage: Storing lubricants in insulating oil tanks or containers can help maintain higher temperatures and prevent the oil from reaching its pour point.
- Use an engine block heater: In cold climates, using an engine block heater can heat the engine and oil before starting the vehicle, helping to lower the pour point of the oil.
It is important to note that these methods may have limitations depending on the specific lubricant and its intended application. Consulting with the lubricant manufacturer or industry professional can provide more specific advice for your specific needs.