What are the symptoms after using counterfeit engine oil?

2 Answers
Corinne
08/30/25 3:22am
After adding counterfeit engine oil to a car, the following symptoms may occur: Symptom 1: Generally, counterfeit engine oil causes significant damage to the car's engine, and the water in the engine radiator evaporates more quickly. Symptom 2: The car engine may experience unstable idling, increased noise (louder at higher speeds), higher fuel consumption, abnormal engine sounds, insufficient power, and poor acceleration. Symptom 3: Symptoms may include shaking when parked, cylinder scoring, increased carbon buildup, premature activation of the maintenance light on the dashboard, etc. These issues can easily lead to cylinder scoring and bearing failure, shortening the engine's lifespan. In severe cases, they may cause sudden breakdowns, endangering the safety of the vehicle owner.
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ColinAnn
09/11/25 7:28am
I recently accidentally used counterfeit engine oil, and my car has been plagued with problems. The engine noise is particularly loud, with constant creaking sounds during startup. There's a noticeable drop in power during acceleration, and the car moves sluggishly when I press the gas pedal. Fuel consumption has also skyrocketed, about 20% higher than usual, making every refuel feel like a waste of money. When the air conditioning is on, the noise is deafening, and passengers complain about severe vibrations. At the repair shop, the mechanic said the counterfeit oil had insufficient lubrication, causing unstable oil pressure and increased internal friction, leading to worn piston rings. I spent thousands replacing parts and cleaning out sludge. Now, I only buy oil from official channels and carefully check the anti-counterfeiting codes. Otherwise, car problems not only mean expensive repairs but also the risk of breaking down halfway, affecting work and travel. This lesson taught me that trying to save a little money can lead to big troubles.
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