Does Engine Oil Affect Fuel Consumption? Right Oil Selection & Savings
The engine oil that vehicle owners pay attention to during periodic maintenance not only protects the engine, but also directly impacts fuel consumption. Using an oil with the wrong viscosity (thickness) increases internal engine friction, causing higher fuel consumption.
How Does Engine Oil Lower Fuel Consumption?
Moving parts inside the engine are in constant friction. Fully synthetic and lower-viscosity oils (such as 0W-20 or 5W-30) create less resistance between moving components. This allows the engine to rotate more easily, reducing fuel consumption by 2% to 5%.
Why Does Old Engine Oil Cause Higher Fuel Consumption?
- Increased Friction: Oil that loses its protective properties over time turns into sludge and loses its fluidity.
- Overheating Issues: Because aged oil cannot conduct heat effectively, the engine runs hotter and suffers a drop in efficiency.
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How to Choose the Right Engine Oil?
The best oil for your vehicle is the one that meets the approval standards and viscosity ratings specified in the manufacturer's manual. Choosing a thicker oil than required does not protect the engine better; instead, it raises fuel consumption.
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