How to Know if the 4S Shop Has Changed the Engine Oil?
1 Answers
Methods to determine if the 4S shop has changed the engine oil: 1. Locate the oil dipstick handle in the engine compartment; 2. Prepare a piece of tissue paper; 3. Pull out the oil dipstick and drip the oil onto the tissue paper; 4. Observe the color directly—if the color is brown and transparent, it indicates that the 4S shop has changed the engine oil for the car. If the color is black or even contains impurities, it likely means the oil has not been changed. Engine oil is referred to as the 'blood' of the engine, as it plays roles in lubrication, cleaning, sealing, buffering, rust prevention, and heat dissipation within the engine. During regular vehicle use, it is essential to change the engine oil periodically; otherwise, it can accelerate engine wear. If engine oil is not changed for a long time, its lubricating performance will degrade, and the oil stored in the oil pan for extended periods can oxidize and deteriorate.