What Are the Standards and Classification Grades of Engine Oil?

[LaJasper]

Engine oil standards and classification grades are as follows: 1. The 'S' series represents oils for gasoline engines; 2. The 'C' series represents oils for diesel engines; 3. If both 'S' and 'C' letters are present, it indicates that the oil is suitable for both gasoline and diesel engines. The functions of engine oil include: 1. Reducing friction and high temperatures; 2. Cooling and lowering temperature; 3. Cleaning and removing contaminants; 4. Damping and cushioning; 5. Preventing rust and corrosion. Engine oil, also known as engine lubricant, can have adverse effects if inferior quality is used: 1. It degrades the oil quality, reducing its performance; 2. It impairs the lubrication of precision components like fuel pumps and injectors; 3. It decreases the power output of the generator set; 4. It negatively impacts the combustion efficiency of the engine.

[PenelopeFitz]

I've been driving for nearly twenty years, and choosing engine oil is not something to be taken lightly—those standards are safeguards. Simply put, viscosity grades like 5W-30: the '5W' indicates the oil flows quickly without clumping in cold winter temperatures, while the '30' means the oil remains adequately viscous in summer heat to protect the engine. Performance ratings such as API SP or SN—SP being the latest and better—reduce engine wear and improve fuel efficiency. Then there are international standards like ILSAC GF-6, ensuring environmental friendliness and high efficiency. I always refer to the manual when selecting oil, as using the wrong viscosity numbers could harm the engine. Regular oil changes are also crucial—I change mine roughly every 5,000 kilometers to avoid costly repairs. Remember, using the wrong oil can lead to serious issues like higher fuel consumption, increased noise, and compromised safety—always prioritize safety first.

[StOlive]

As a car enthusiast, I find motor oil standards quite fascinating. Let me share some insights. Viscosity grades like SAE 5W-20 or 10W-40 indicate performance - the former offers quicker cold starts while the latter provides better high-temperature protection. Performance classifications such as API ratings (from SL to SP) show increasing levels of toughness and oxidation resistance. ILSAC standards like GF-6 focus on fuel efficiency and environmental protection. When choosing oil, consider climate and driving conditions - lower W numbers work better for cold weather starts. I prefer full synthetic oils for their durability, keeping the engine quiet and acceleration smooth. Don't just look at price; matching your vehicle's requirements is key. Here's a lesson from experience: using the wrong oil accelerates engine wear - a single repair can cost thousands, so always check your manual for the proper grade.

[EliDella]

Just started driving, learn a bit about engine oil. Standards include viscosity grades like 5W-30, where 5W is suitable for quick cold starts in winter without sticking, and 30 represents stable oil thickness in summer heat without thinning. Performance levels like API SN or SP offer better engine protection. Always check your vehicle's manual when choosing and don't make random changes. Why is it important? Wrong oil can cause noisy engines or higher fuel consumption. Beginners often neglect regular oil changes, but I've learned to check every six months to avoid breaking down on the road. Simply remember to match viscosity numbers to local temperatures and choose higher performance levels for reliability.