In addition to Synthetic motor oil there are also other classification for engine oils also known as Mono and Multi grade categorization.
Mono-grade motor oil (Mineral) using mineral oil with API classification levels of quality SC and SE By SAE grades 40 and 50 are available and appropriate in automobile gasoline.
Multi-grade Gasoline engine oil is a high performance oil , which formulated with mineral and synthetic to be used in gasoline engines of the new generation, hybrid and CNG with acceleration and high power design and minimal thermal degradation and proper control of sediments. The additives in the formula are approved by major truck manufacturers such as BMW, Mercedes Benz, VOLVO and etc. This product is also very low in sulfate ash and prevents deposits caused by combustion in the engine. According to API classification, the products are available in SL and SN grades and are also classified according to SAE classification to 0w40,0w30,0w20, 20w50, 15w40, 10w40, 10w30, 5w30 and etc.