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What Is Engine Oil? Engine oil is a fluid that lubricates, cleans, and cools engine parts. It helps the engine run smoothly and prevents damage under extreme conditions—temperatures ranging from below freezing to over 300°F (150°C), and pressures exceeding 1,000 psi.

[Definitive Guide]What is Engine Oil? 5 Best Engine Oils Tested and Reviewed

17 December, 2025 Nicolas Tesla

Overview:Engine oil is a lubricating fluid used in internal combustion engines to reduce friction between moving parts and protect components from wear. It circulates through the engine to lubricate pistons, bearings, and camshafts while also

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