How Oil Degrades Over Time Fresh oil is clean, viscous, and formulated to suspend contaminants. Additives designed to prevent sludge, reduce friction, and neutralize acids gradually deplete, leaving the remaining oil less effective at protecting critical parts.
Oil Change Delay Engine Wear and Accelerated Damage
Hot spots begin to form, leading to thermal breakdown where the oil itself starts to burn and form varnish. Sludge, Deposits, and Clogged Filters Moisture and fuel dilution combine with degraded oil to create a thick, tar-like substance known as sludge.
This drag forces the engine to work harder, which increases fuel consumption. Cylinder walls can score to the point where the engine burns oil or loses compression entirely.
Oil Change Delay Engine Wear and Accelerated Damage
The result is uneven wear that permanently alters clearances, reduces compression, and can lead to expensive repairs or engine replacement. Without fresh lubrication, surfaces that should glide smoothly begin to rub, creating microscopic scoring that grows over time.
More About What happens if you don't change your oil
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