WHY CHANGE YOUR MOTOR OIL?

The additives that are contained within motor oil is consumed, used up or destroyed as the engine operates. When the additive package is destroyed, it becomes a contaminant; it doesn't just evaporate or disappear. If it is not removed at good service intervals, it could possibly become a catalyst to sludge formation. For instance, the viscosity index improver is shaped like an expanding and contracting slinky-toy. When it is destroyed, the sheared parts are useless and become contamination to be caught in the oil filter.

Motor oil in the engine becomes contaminated with many things including blow-by, condensation, fuel, dust, metallic shavings, and sometimes even antifreeze. The contaminant, especially those that are liquid, are not completely removed by the oil filter. As they are whipped into the oil, sludge is formed. This sludge, if not removed by changing the oil, may eventually be baked onto various parts of the engine. Baked-on or oxidized sludge can cause the engine to perform less efficiently and may eventually lead to engine failure.