If you’ve ever bought a quart of motor oil for your vehicle, you’ve likely encountered the letters API somewhere on the label. In fairness, there are a lot of abbreviations, symbols and odd number combinations on a motor oil label, so you might have missed it. Engines, including those used in automobiles, motorcycles, and equipment, often require the use of motor oil, set apart by various classifications, that meet a prescribed set of standards. The broadest classification typically requires
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