What is the specific gravity of engine oil?
2 Answers
The specific gravity of engine oil is approximately 0.91kg×10 cubic (kilograms/cubic meter). Definition of engine oil: It refers to the specialized lubricating oil used in internal combustion engines, which also serves functions such as cleaning, rust prevention, and cooling. Engine oil grades: Engine oil grades are classified by quality grade and viscosity grade. Oils for gasoline engines are usually denoted by the letter "S", while oils for diesel engines are typically denoted by the letter "C". Composition of engine oil: It consists of base oil and additives, where base oil is the main component of lubricating oil that determines its basic properties, while additives can improve the deficiencies of the base oil.
As a veteran driver with decades of experience, I find the specific gravity of engine oil quite interesting. It typically fluctuates between 0.85 and 0.95, meaning it's slightly lighter than water. If you see a specific gravity below 0.85, it indicates the oil might be diluted, possibly mixed with gasoline or condensed water, which accelerates engine wear. Conversely, a specific gravity above 0.95 suggests the oil could be too thick or heavily contaminated, affecting lubrication. I always pay attention during oil changes because changes in specific gravity reflect the oil's condition. In winter, when temperatures are low, the specific gravity rises slightly, and the opposite happens in summer. Regular checks can prevent major repairs, and synthetic oils usually have more stable specific gravity, making maintenance easier. Don't wait until the engine starts making strange noises to regret it.
