What is 97-grade engine oil?
2 Answers
97-grade engine oil is a type of engine oil, consisting of 97% isooctane and 3% n-heptane. The following is a detailed introduction about automotive engine oil: 1. Overview: Engine oil, also known as engine lubricant, is called Engine-oil in English. Its density is approximately 0.91×10³ (kg/m³). It serves to lubricate and reduce friction in the engine, assist in cooling, seal against leaks, prevent rust and corrosion, and act as a shock absorber. 2. Composition: Engine oil is composed of base oil and additives. The base oil is the main component of lubricating oil, determining its fundamental properties. Additives can compensate for and improve the deficiencies in the base oil's performance, endowing it with certain new properties, making them an important part of lubricating oil.
I've seen many car owners confused about the meaning of '97-grade' engine oil. In fact, in the field of car maintenance, engine oils are primarily classified based on SAE viscosity standards, such as the common 5W-30 or 10W-40. These numbers indicate the oil's flow characteristics at different temperatures. The number 97 isn't part of standard viscosity grades—it might be a misunderstanding or a specific brand's product code. Perhaps you're thinking of gasoline octane ratings, where 97-grade fuel denotes good anti-knock properties suitable for high-performance engines. Engine oil's role is to lubricate internal engine components, reducing friction and overheating. Using the wrong oil may lead to increased fuel consumption or engine damage. I recommend first checking your vehicle's user manual to purchase oil with the manufacturer-recommended viscosity, or visit a professional shop to test your current oil's quality. Don't delay oil change intervals too much—typically every 5,000 to 10,000 kilometers—to ensure engine health and save on fuel costs.
