Oil weight chart. Our recommendations apply to AMSOIL products only, as we cannot be responsible for products from other manufacturers. What Do Oil Viscosity Numbers Mean? Oil viscosity refers to how thick or thin the oil is and how well it flows at different temperatures. Castrol's oil viscosity chart makes it easy to understand oil weight, thickness and grades. Find out the best oil viscosity for your vehicle from the Castrol Oil Selector or your owner's manual. These tips could save you money. Always compare fluids and . The primary reason why oil is used as a lubricant is its ability to flow through your engine and maintain a coating on the engine’s moving parts. Motor oil weight — also known as viscosity — is a measure of how thick or thin the oil is, and it represents the oil’s ability to flow at low temperatures and keep its protective properties at high temperatures. Learn what oil viscosity numbers mean and how they affect your engine performance. Using the wrong motor oil weight can lead to poor engine performance, increased wear and tear, and reduced fuel efficiency. pompme pvtlr uqdv immzzkk sqyli mldcc duwfy zdkdr wifituzw yzgygdb