What is 97-grade engine oil?

[LeAngelo]

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.

[StNova]

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.

[SanMaverick]

I'm someone who regularly maintains my car, and the term '97-grade oil' might be confusing engine oil with gasoline. Gasoline, such as 97-octane, indicates a high octane rating, suitable for turbocharged engines to reduce knocking. Engine oil, on the other hand, is a lubricant classified by SAE viscosity grades like 0W-20 or API ratings such as SP. The number 97 is uncommon in engine oil classifications—it might refer to a specific product model or a misstatement. Engine oil protects the engine by reducing wear and also aids in heat dissipation. When selecting oil, always follow your vehicle's manual; don't just focus on numbers. I once used the wrong oil and noticed the engine noise increased, but thankfully I caught it in time and replaced it. Remember, good-quality engine oil extends engine life, and regular changes are essential maintenance—typically recommended every six months or 10,000 kilometers. While using high-quality gasoline is beneficial, engine oil is truly the heart's guardian of your engine.

[DavidDella]

I believe '97-grade engine oil' might be a non-standard term. Engine oils are typically classified by SAE viscosity grades, such as 10W-40 indicating cold-start performance and high-temperature protection – the number 97 isn't part of this system, possibly a mistaken application of gasoline octane ratings. Engine oil functions to lubricate the engine, prevent component wear from friction, and provide cooling effects. Oil selection should match the vehicle type – for instance, older cars use higher viscosity oils like 15W-50, while newer models use low-viscosity energy-efficient oils. If the owner's manual doesn't mention 97-grade oil, don't take risks; consult a repair shop or purchase brand-certified oil. Pay attention to both mileage and time intervals for oil changes to avoid sludge buildup from delayed servicing. Simply put, don't fixate on numbers when choosing oil – prioritize actual requirements.