What are the disadvantages of changing engine oil after warming up the car?
1 Answers
The disadvantages of changing engine oil after warming up the car include: 1. The oil is more susceptible to being burned; 2. There is a higher risk of oil leakage. It is necessary to warm up the car for about 5 minutes before changing the oil. The purpose of warming up the car before an oil change is to allow the old oil to drain more thoroughly. When the oil is at a certain temperature, its viscosity is lower, and its fluidity is higher. Additionally, it helps to soften the sludge inside the engine, allowing the softened sludge to be discharged along with the old oil. The oil draining speed will also increase. However, it is not advisable to change the oil while the car is still being warmed up. Engine oil mainly contains anti-wear additives or detergents, dispersants, and multi-grade oil viscosity index improvers. Engine oil is used for lubricating internal combustion engines.