Choosing the right engine oil is one of those aspects of vehicle maintenance that has a real impact on performance, durability, and driving comfort. A poorly chosen or neglected lubricant can shorten the lifespan of the engine and even lead to serious failures. That’s why it’s worth knowing what oil is responsible for, what its properties are, and why selecting a product from a reputable manufacturer matters.
The role of engine oil
Engine oil is not just an ordinary fluid – it is a precisely engineered blend of base oils and additives that are responsible for several key processes inside the engine.
First, it reduces friction between metal components operating at high speed and under load. It forms an oil film that separates surfaces, protecting them from seizure.
Second, oil draws heat away from the hottest areas, assisting the cooling system. This minimises the risk of overheating pistons, valves, and the turbocharger.
Third, it acts as a cleaning agent – detergent and dispersant additives bind contaminants such as soot or microscopic metal particles and keep them suspended, preventing deposits from forming in critical areas.
Finally, oil protects engine components against corrosion. Modern formulations, including shell engine oil, contain oxidation inhibitors that prevent rust and surface degradation, even in high-humidity conditions or during short trips in low temperatures.
Regular oil changes and level checks
The quality of the oil and the manufacturer’s reputation are extremely important, but even the best lubricant loses its properties over time. High temperatures, contact with combustion by-products, and natural ageing processes mean that oil eventually needs replacing. This is why following the service intervals specified by the car manufacturer is essential.
Equally important is regularly checking the oil level. Some engines consume virtually no oil between changes, while others use it in larger amounts. In such cases – especially before a long trip – it’s worth ensuring that the oil pan contains the correct amount of lubricant. Too low a level risks a loss of oil pressure, which can lead to bearing seizure or turbocharger damage. Excess oil is also undesirable – it can cause foaming and, in extreme cases, enter the intake system.
What influences engine protection effectiveness
Many factors affect how well oil works. Viscosity must be matched to climate conditions and engine specifications. Oil that’s too thick makes cold starts harder, while oil that’s too thin may not provide adequate protection under heavy load.
Additives also play a key role – anti-wear agents, detergents, dispersants, and corrosion inhibitors. High-quality oils, such as those offered by Shell, maintain stable properties across a wide range of temperatures and loads, ensuring optimal lubrication during city driving, highway cruising, or mountain roads.
Operating conditions and oil lifespan
Oil ages faster in vehicles driven mainly over short distances, where the engine does not reach optimal operating temperature. In such conditions, more moisture and fuel accumulate in the oil, reducing its lubricating properties. Likewise, driving in high temperatures, constant heavy loads, or towing a trailer accelerate lubricant degradation.
Therefore, it’s not always best to rely solely on the maximum mileage between oil changes stated in the service manual. Sometimes it’s better to shorten the interval, especially if the vehicle operates in demanding conditions.
Summary
Engine oil is responsible for lubrication, cooling, cleaning, and corrosion protection – without it, the engine would quickly lose efficiency. Even the best product, such as shell engine oil, will not fulfill its role if used for too long or in too much. Regular checks and timely replacement are an investment in the long, trouble-free operation of the engine and in safe travel.
Source: FG Newswire