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

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