What is the classification of full synthetic engine oil?

1 Answers
LaTheo
07/29/25 10:26pm
Currently, full synthetic engine oil is mainly classified as SN grade. The API (American Petroleum Institute) classification system for engine oil includes SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL, SM, and SN grades, with SN being the highest grade available today. Below is an introduction to engine oil classifications: 1. Mineral oil: Mineral oil is extracted from crude oil and is relatively viscous and inexpensive. It provides basic protection and can be considered the most fundamental type of engine oil. 2. Synthetic oil: Synthetic oil is artificially produced through chemical processes. Full synthetic oil offers the best performance. For vehicles with turbocharged (T) engines, using full synthetic oil ensures excellent smoothness and cleanliness, with a longer replacement interval of up to 1 year or 10,000 kilometers. 3. Semi-synthetic oil: Semi-synthetic oil is a blend of synthetic and mineral oils, offering performance that falls between the two. Its price and replacement cycle are also intermediate. For ordinary naturally aspirated engines, semi-synthetic oil is a suitable choice.
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