Posts Tagged: What is synthetic motor oil?
What is synthetic motor oil? In the strictest sense, synthetic motor oil is made from polyalphaolefin (PAO) base stock, with ester blended in to help various additives dissolve and also provide seal compatibility. But oil made from crude can masquerade as synthetic (more on that below) Amsoil was the first company to introduce a PAO/ester synthetic oil in 1972, followed by Mobil Corporation. But not all synthetic oil is PAO/ester. Synthetic motor oil has several meanings In 1990’s he American Petroleum Institute (API) introduced the Engine Oil Licensing & Certification … Read More