Which is better, SP or SN grade engine oil?
1 Answers
Whether it is SP or SN grade engine oil, they are both API certified standards. Although the best choice is the oil that best suits your vehicle, SN grade oil is the latest standard introduced. Theoretically, SP grade oil is better than SN grade oil, with superior performance. Here is some information about API: 1. API grades are as follows: There are currently 13 types of S-series engine oils, namely SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL, SM, SN, and SP. According to the alphabetical order, the oil represented by a later letter is superior to that represented by an earlier letter. 2. API certification standards: API is the abbreviation for the American Petroleum Institute, which is responsible for setting standards. Engine oils that meet API certification standards will bear the API certification mark.