Should You Warm Up the Car Before an Oil Change?
2 Answers
It is necessary to warm up the car before an oil change, typically for about 5 minutes. Below are the benefits of warming up the car before an oil change: 1. Engine oil is a liquid with a certain viscosity. If the temperature is low, the viscosity will be higher, making it difficult for the oil to flow out when the oil pan drain plug is removed. 2. There is some sludge inside the engine, which will soften after warming up the car, allowing it to be flushed out along with the old oil. 3. Removing the oil filter becomes easier after warming up the car. During an oil change, the oil filter should be replaced as well. There is a lot of oil and sludge around the oil filter, making it difficult to remove when the engine is cold. Additional note: When changing the oil, make sure to completely drain the old oil before adding new oil. Otherwise, the old oil can contaminate the new oil, reducing its lubrication effectiveness and performance.
With years of experience in automotive maintenance, I always ensure the engine reaches normal operating temperature before shutting it off for an oil change. This enhances the fluidity of the old oil, allowing it to drain more thoroughly. At hot oil conditions, impurities are less likely to settle, preventing residue from clogging oil passages or damaging the new filter. After shutting off the engine, waiting a few minutes for the temperature to slightly drop ensures safe and efficient operation, while also allowing me to inspect the oil pan gasket for integrity. Regular maintenance like this extends engine life, reduces abnormal noises, and improves fuel efficiency. Changing oil when the engine is cold results in thick, slow-draining oil with more residue, significantly diminishing the effectiveness of the new oil. I always advise vehicle owners to invest this extra time—it's a long-term protective measure that greatly enhances overall driving performance.
