Why does the new Mondeo use 5W20 engine oil?
2 Answers
The reason the new Mondeo uses 5W20 engine oil is that W20 oil has a relatively low viscosity grade, which is more suitable for some small-displacement naturally aspirated engines with lower maximum RPM requirements. Below is relevant information about engine oil: 1. Viscosity value: The number after W represents the viscosity value at 100°C. The larger the number, the higher the viscosity of the oil, and the better it protects the engine. For 5W20 oil, the number after W is 20, indicating a viscosity grade that is not particularly high. 2. Oil composition: Engine oil mainly consists of base oil and additives, with various types of additives such as dispersants, detergents, oiliness agents, rust inhibitors, pour point depressants, emulsifiers, and anti-oxidation and anti-corrosion agents.
You asked why the new Mondeo uses 5W-20 engine oil? Primarily because its engine design emphasizes efficiency and fuel economy. 5W-20 is a low-viscosity oil, meaning it flows well at low temperatures, ensuring smooth cold starts without seizing, quickly lubricating engine components to reduce wear. Additionally, lower viscosity means less friction, naturally reducing fuel consumption and saving you money at the pump. Ford engineers specifically tuned the Mondeo's Ecoboost engine for this oil, as its tight-clearance structure works best with it—using the wrong oil could lead to increased carbon buildup or sluggish response. I've seen many owners ignore the manual's recommendation, only to face soaring fuel consumption and louder engine noise. It's not worth the risk. Always have your technician use the correct oil during maintenance to extend your car's lifespan by over 100,000 kilometers. In short, using 5W-20 saves fuel and protects your engine.
