There are differing opinions on whether it is better to drain oil when the engine is cold or warm. Some believe that draining oil when the engine is cold allows the oil to settle and ensures that more of the old oil is removed.
Our reporter from VTC News reached out to engineer Tran Van Chung, Director of Tran Chung Garage, for his insights. According to Mr. Chung, changing oil while the engine is still warm has its advantages. Warm oil is in a more liquid state, which allows for quicker drainage and a faster oil change process.
Experts recommend changing oil when the engine is cold. (Illustrative image)
However, he also pointed out some potential drawbacks to this approach. When the engine has just been running, oil may still be splattered on various components, making it challenging to ensure a thorough removal of old oil. Additionally, working on a warm engine can be dangerous due to the high temperatures of the various parts, including the oil, which poses a burn risk.
Considering these factors, Mr. Chung recommends changing oil when the engine is cold. Once the vehicle has stopped running, oil and contaminants settle in the oil pan. As the engine cools down, oil drains into the pan, allowing for a more complete removal of old oil.
For the best results in oil drainage, Mr. Chung suggests waiting for the oil to drain completely, then starting the engine for about 2 minutes before turning it off again. This process ensures that any remaining contaminants are flushed out along with the excess oil.
Source: VTC News
Frequently asked questions
It is recommended to change your engine oil when the engine is warm, not hot or cold. Warm oil flows more easily, allowing for a more complete drain, and it also provides a more accurate reading on the oil’s viscosity and condition.
Changing the oil when it’s warm ensures that it flows freely and carries away any dirt or debris that has accumulated. This helps to keep your engine clean and maintains its performance. Additionally, checking the oil level and condition when warm gives you a better indication of any potential issues.
If the oil is changed when the engine is too hot, it can result in burns and an increased risk of spilling hot oil. On the other hand, cold oil is thicker and doesn’t drain as effectively, leaving residual oil in the engine. This can lead to inaccurate measurements and a less-than-optimal oil change.
Simply drive your car for around 5 to 10 minutes before changing the oil. This will warm up the engine sufficiently, ensuring the oil is at the ideal temperature and viscosity for a safe and effective oil change.
Yes, by changing the oil when warm, you also get a more accurate reading of the oil filter’s condition. This helps you determine if the filter needs to be replaced as well. Additionally, warm oil can help loosen any debris or buildup in the engine, making it easier to remove and reducing the risk of engine damage.
