How to Determine the Grade of Engine Oil?
3 Answers
Engine oil grades are classified according to quality and viscosity levels. Below is a detailed introduction on how to determine engine oil grades: 1. Identification of engine oil for car engines: Oil for gasoline engines is usually denoted by the letter S, while oil for diesel engines is usually denoted by the letter C. 2. Composition of engine oil: Engine oil consists of base oil and additives, where the base oil is the main component of the lubricant, determining its basic properties, and additives can improve the deficiencies of the base oil. 3. Specifications for S-series engine oils: SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL. 4. Specifications for C-series engine oils: CA, CB, CC, CD, CE, CF, CF2, CF4, CG4, CH4, CI4.
Determining the oil grade is actually not difficult. I've been driving for over a decade and rely on a few simple methods to get it right. First, check the label on the oil container, which shows codes like SAE 5W-30. The '5W' indicates low viscosity during cold starts, making it suitable for winter. Second, pull out the vehicle manual—it clearly lists the appropriate viscosity grade. Don't skip this step to avoid buying the wrong oil. Third, check the oil quality markings like API SN, which represent anti-wear performance. I once used substandard oil, and the engine started making grinding noises. Since then, I’ve made it a habit to verify the label before every oil change. Remember, don’t rely on gut feelings—using the wrong grade can increase fuel consumption and damage your car. Regular checks can significantly extend your car’s lifespan and save on repair costs!
To understand oil grades, I picked up some tricks from my automotive hobby. First, check the SAE rating on the bottle label, like 5W-30—the 'W' stands for winter viscosity performance, and a lower number means better cold-weather flow. Then look at the API standard, such as 'SN' for high-quality gasoline engines. Don’t just guess: pop the hood and check the dipstick—if the oil is dark and smells off, verify the grade. Or simply look up your car’s recommended code online. I’ve noticed viscosity greatly affects fuel economy—thicker oil like 10W-40 offers steadier protection in summer, but don’t mix them up. Quick tip: memorize label numbers when choosing oil, and ask a mechanic if unsure to avoid engine trouble. Stick to this habit, and your car will run smoother.
