How to Read Engine Oil Specifications?

[LaBrantley]

Methods for reading engine oil specifications: 1. The smaller the number before 'W', the better the low-temperature fluidity and quality of the oil; 2. The larger the number after 'W', the better the high-temperature viscosity and oil quality; 3. For specifications like SA, SB, SC, SD, etc., the further the letter after 'S' is in the alphabet, the higher the oil grade and quality. Engine oil, also known as motor lubricant, is often referred to as the 'lifeblood' of a car. It serves multiple functions such as lubrication, cleaning, cooling, sealing, wear reduction, rust prevention, and corrosion protection for the engine. Engine oil consists of two main components: base oil and additives. The base oil is the primary constituent of lubricants, determining their fundamental properties, while additives are used to compensate for and improve any deficiencies in the base oil's performance, as well as to impart new characteristics, making them an essential part of lubricants.

[JuliaMarie]

I've always driven older models, and experience tells me that oil viscosity grades are quite straightforward. Look at the numbers on the label, like 5W-30: the 'W' stands for Winter. The smaller the first number (like 0W or 5W), the smoother the cold starts, protecting the engine from damage. The larger the second number (like 30), the thicker the oil at high temperatures, preventing engine wear. Remember, adjustments are needed for different seasons or regions—use 0W in northern winters, and 30 or 40 in southern summers for better safety. Also, check the API symbol; for example, SP indicates the highest quality, ensuring oil durability. Never use the wrong oil—always confirm your car's requirements in the manual. I've seen cases where wrong oil caused loud noises, leading to costly and time-consuming repairs. Regularly checking the dipstick helps detect issues early.

[SanEli]

As a new car owner who just bought a hybrid, I need to pay attention to the tech-savvy aspects of engine oil grades. The SAE code like 0W-20 represents a low-viscosity design, where the number before W ensures quick battery system startup, and the number 20 after W improves fuel efficiency and reduces emissions. I usually scan the label with my phone app to check the API rating, such as the new SP certification compatible with autonomous driving systems. Choosing the right synthetic oil can extend engine life and prevent carbon buildup issues. It's advisable to refer to the vehicle manual and environment—0W-20 saves fuel for city driving, while 20W offers better protection for long highway trips. Technological advancements have made oils more eco-friendly, so don’t overlook these small details.

[Robinson]

As a family user, safety is my top priority. Understanding oil viscosity grades is straightforward. The SAE label like 5W-30 represents fluidity: 5W indicates low viscosity during cold starts to prevent freezing issues; 30 means thicker protective layer in hot weather to reduce wear. Use 0W oil in winter and higher grades in summer for better stability. Remember API standards like SN are suitable for family cars to prevent corrosion. Don't just look at the price—wrong oil selection can damage the engine and risk stalling. Check oil levels frequently during maintenance to ensure safe travels for the kids, and never exceed 5,000 km between oil changes.