What is the normal color of engine oil?

1 Answers
VonOlive
07/29/25 11:47am
When freshly added, car engine oil appears golden yellow. The detergents and dispersants typically added in the oil help clean off the gum films and black carbon deposits adhering to the pistons, dispersing them in the oil to reduce engine deposits. Additional information: 1. If the engine oil is black and murky, it indicates that the oil should be changed; 2. If there is no oil leakage but the oil level decreases and blue smoke appears when revving the engine, it indicates oil burning; 3. If the engine oil appears milky yellow, it indicates the presence of water in the oil. For safety, it's best to calculate oil changes based on maintenance mileage. Once a certain mileage is reached, take the car to a repair shop for maintenance to better extend the vehicle's service life.
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