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What is the density of engine oil?

2 Answers

DeFrancisco

07/24/25 10:51am

Engine oil density is approximately 0.91kg×10 cubic. Composition of automotive engine oil: Engine oil consists of base oil and additives. Base oil is the main component of lubricating oil, determining its fundamental properties. Additives can compensate for and improve the shortcomings of base oil performance, endowing it with certain new characteristics, making them an important part of lubricating oil. Importance of automotive engine oil: The condition of engine oil not only directly affects the working state of the engine but also influences its lifespan. Engine oil operates in extremely harsh conditions, with impurities from gasoline combustion contaminating it. Over time, engine oil oxidizes and deteriorates.

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LeChristopher

08/11/25 5:52am

As a car enthusiast who loves cars like life itself, I must say there's real science behind engine oil density. Having driven for over 20 years and tried all kinds of oils, the density typically ranges between 0.85 to 0.95 grams per cubic centimeter. For instance, mineral oil might be around 0.88, while synthetic oil has lower density and flows more easily. Temperature makes a huge difference - density increases in cold winter temperatures and decreases when it's hot in summer. That's why I always carry a simple densimeter to check. If the reading deviates too much, it might indicate oil aging or contamination, and I change it immediately to prevent engine wear. Recording density values during routine maintenance helps monitor oil quality changes. When combined with observing oil color and viscosity, it makes driving smoother, more fuel-efficient, and keeps the car in much better overall health.

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