What kind of oil is generally used for naturally aspirated engines?

[RonanAnn]

Naturally aspirated engines generally use mineral oil. Engine oils on the market are divided into mineral oil, full synthetic oil, and semi-synthetic oil. The details are as follows: Mineral oil: The cheapest option, usually replaced every six months or 5,000 kilometers. This oil is refined from crude oil with additives mixed in. It offers the least protection and lubrication for the engine and has the poorest durability. Full synthetic oil: The most expensive option, with a replacement cycle of one year or 10,000 kilometers. This oil refers to high-quality products made from PAO (polyalphaolefin) or artificially synthesized esters. Nowadays, many companies also classify oils blended from Group IV and V base oils without mineral oil additives as full synthetic oil. Full synthetic oil provides the best engine protection, lubrication, and longevity. Semi-synthetic oil: Priced between the two, its performance and longevity are also intermediate. It is typically replaced every 7,500 kilometers. This oil is essentially a 4:6 blend of mineral oil and full synthetic oil.