Can Mobil Really Last 18,000 Kilometers?
2 Answers
Mobil can indeed last up to 18,000 kilometers, but this depends on the condition of the vehicle and the road conditions. The same oil will perform differently in new and old vehicles. Therefore, the best oil is the one that suits your vehicle, which naturally allows for longer mileage. Below are the functions of engine oil: 1. Friction Reduction: A sufficiently thick oil film separates the surfaces of relatively sliding parts, thereby reducing wear. 2. Sealing: Engine oil can form a seal between the piston rings and the piston, reducing gas leakage and preventing external contaminants from entering. 3. Rust Prevention: Lubricating oil adheres to the surface of parts, preventing contact with water, air, acidic substances, and harmful gases. 4. Cushioning: When the pressure at the engine cylinder port rises sharply, suddenly increasing the load on the piston, piston skirt, connecting rod, and crankshaft bearings, this load is transmitted and lubricated through the bearings, cushioning the impact load. 5. Cleaning: High-quality engine oil can carry carbon deposits, sludge, and worn metal particles from engine parts back to the oil tank through circulation, washing away dirt generated on the working surfaces of the parts through the flow of the lubricating oil.
I heard Mobil oil can last 18,000 km, and I must say that's possible under certain conditions—like if you drive a new car with full synthetic oil, mostly highway miles or minimal city traffic, where oil degradation is slow. Having driven for over a decade myself, I’ve tried several of Mobil’s extended-performance products. Once, after an oil change, I ran nearly 15,000 km and the oil test still showed normal readings. But this isn’t a universal rule. If your car is older, or you frequently drive aggressively, tackle mountain roads, or face hot weather, oil contamination accelerates. Forget 18,000 km—even hitting 10,000 km might risk engine wear. A friend of mine stubbornly pushed to 18,000 km, only to find the oil sludgy and the filter clogged with debris, costing him over a thousand in repairs. Don’t rely solely on marketing for oil-change intervals. Check your manual, consider your habits, monitor oil quality regularly. Saving money isn’t worth cutting corners—safety comes first.
