Is 5W30 Fully Synthetic Oil?
1 Answers
5W30 is an oil viscosity grade designation and does not exclusively indicate fully synthetic oil, as different quality oils share this same viscosity grade. For example, Mobil Super 2000, Shell HX6, and Castrol GTX 5W30 variants are semi-synthetic oils; while Shell HX5, Shell HX3, and Total Quartz 3000 5W30 versions are mineral oils. More oil-related information is as follows: Quality Grade Classification: Motor oils can be categorized into fully synthetic oil, semi-synthetic oil, and mineral oil based on quality grades. Fully synthetic oil offers the highest quality, followed by semi-synthetic oil, with mineral oil being the lowest grade. Standard All-Season Oil Viscosity Grades: 5W20, 5W30, 5W40, 5W50, 10W20, 10W30, 10W40, 10W50, 15W20, 15W30, 15W40, 15W50, 20W20, 20W30, 20W40, 20W50. Meaning of "W": The "W" stands for Winter, and the number preceding it indicates the oil's fluidity at low temperatures - the smaller the number, the better the fluidity. Conversely, the number following the "W" represents the oil's viscosity grade at high temperatures - the larger the number, the higher the viscosity, providing better engine protection.