The number before the "W" indicates cold-temperature performance, while the number after indicates performance at high operating temperatures. This is the law of the land, and deviations from this specification can void warranties and cause long-term damage.
Ultimate Guide to Selecting the Right Car Oil
Synthetic oil, on the other hand, is chemically engineered for superior performance. The second number represents the thickness at 212°F; a higher number means the oil maintains its structure under heat and pressure, preventing metal-to-metal contact during heavy loads.
Racing oils contain higher levels of zinc to protect flat-tappet camshafts. Using the wrong grade can lead to decreased fuel economy, sluggish performance, and even catastrophic engine failure over time.
Understanding Oil Viscosity Numbers and Grades
Mineral oil is refined from crude oil and is the most budget-friendly option. Choosing the correct fluid for your engine is one of the most important decisions you will make as a car owner.
More About What oil is needed for my car
Looking at What oil is needed for my car from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on What oil is needed for my car can make the topic easier to follow by connecting earlier points with a few simple takeaways.
