The number before the "W" indicates cold-weather performance—the lower the number, the easier the oil flows when the engine is cold, reducing wear on components during startup. Dark, gritty oil on the dipstick or a burning smell while driving can indicate that the oil is breaking down and losing its thermal stability, requiring prompt attention.
Oil Change Guide for Modern Fuel-Efficient Engines
Regular changes prevent the buildup of acids and byproducts that corrode internal components, ensuring the powertrain remains quiet, smooth, and reliable for years. Without clean oil, metal components grind against each other, creating friction that wears down surfaces and reduces compression.
You might also notice a change in engine noise, such as increased ticking or knocking, which suggests the oil is no longer providing adequate cushioning. Always refer to your owner’s manual for the manufacturer’s recommended grade, as using the wrong viscosity can void warranties and damage the engine over time.
Oil Change Guide for Modern Fuel Efficient Engines
A dashboard oil pressure light or a dipstick reading that shows a low level are clear warning signs that should never be ignored. Fresh oil circulates through the moving parts, reducing friction that causes wear and tear while carrying away heat generated by combustion.
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