Is SN Engine Oil Fully Synthetic?
2 Answers
SN-grade engine oils are generally fully synthetic. The 'S' at the beginning indicates that the oil is for gasoline engines, and the second letter represents the quality grade. There are a total of 12 quality grades for engine oil, ranging from SA to SN, with each subsequent letter indicating superior performance compared to the previous one. The SN grade is the highest rating for gasoline engine oils under the standard. Relevant information about engine oil is as follows: 1. Introduction: Engine oil, also known as engine lubricant (English name: Engine-oil), has a density of approximately 0.91×10³ (kg/m³). It serves to lubricate and reduce friction, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine. It is often referred to as the 'blood' of a car. 2. Composition: Engine oil consists of two main components: base oil and additives. The base oil is the primary component of lubricating oil, determining its fundamental properties, while additives compensate for and improve any deficiencies in the base oil's performance, imparting new characteristics. Additives are an essential part of lubricating oil.
Speaking of SN engine oil, SN actually represents the API service classification, which is a standard certification by the American Petroleum Institute for oil performance. For example, the SN grade is designed for modern gasoline engines, emphasizing cleaning protection and low-temperature fluidity. However, whether it's fully synthetic or not isn't directly related to the SN label—SN-grade oil can be mineral oil, semi-synthetic oil, or fully synthetic oil, depending on the specifications listed on the oil packaging. I often discuss this in car enthusiast groups, where many people mistakenly assume that SN-labeled oil must be fully synthetic. When choosing engine oil, it's essential to carefully check the ingredient label. Fully synthetic oils are usually labeled as 'Fully Synthetic' or '100% Synthetic,' and these types are more commonly used in high-performance cars because they are more heat-resistant and have a longer lifespan. Additionally, regular oil changes are crucial—otherwise, even the highest-grade oil won't be effective.