
Engine oil circulates inside the engine, which is constantly at a high temperature resulting from combusting gasoline.

Oil filter paper will be clogged with impurities such as root, metal powder or dirt and purification performance will decrease.
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When maintenance has not been conducted on a regularly basis, your car will have sympton like "lack of power", "strange noise from your engine" or "lower fuel economy".
When the condition becomes worse, engine overheats and sludge buildup will ocurr which leads to earlier engine breakdown.
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