If the oil filter becomes clogged or is not replaced on schedule, these contaminants circulate through the engine, creating a gritty paste that acts like sandpaper on cylinder walls and bearings. Using a high-quality filter and the manufacturer-recommended viscosity ensures that the new oil remains clean and effective for its full service life.
Understanding How Old or Poor-Quality Oil Causes Knocking Sounds in Your Engine
Performance issues such as decreased fuel economy or a rough idle can also point to oil that has lost its viscosity and protective properties. From reducing friction to suspending contaminants, its role is non-negotiable for vehicle longevity.
You can check the condition of old oil by looking at it; if it has become a dark, sludgy consistency or has visible particles sitting in the bottom of the container, it is no longer suitable for use. If stored improperly in a hot garage or shed, the breakdown happens even faster.
Understanding Engine Oil Knock and Its Impact on Performance
The Impact of Time and Storage While unopened motor oil has a shelf life, generally around five years, opened containers are vulnerable. Additives deplete as they neutralize acids and manage heat.
More About Can motor oil go bad
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