How to Identify Oil Quality by Its Model Number?
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In terms of price, the quality of engine oil can be judged to some extent, as you get what you pay for. High-quality oil generally comes at a higher price. The oil model number consists of two parts: the grade and viscosity specification. Generally, SN and SM grades are considered good. Synthetic oil is better than mineral oil because it is cleaner, purer, and provides longer engine protection compared to mineral oil. Good-quality oil does not have a strong, unpleasant odor; instead, it has a mild, pleasant fragrance. In contrast, inferior oils often have a pungent smell. Generally, synthetic oil should be replaced once a year, while mineral oil requires replacement every six months.