SAE 10W-30 is a type of motor oil that meets the standards set by the Society of Automotive Engineers. The "10W" indicates the oil's viscosity at low temperatures, meaning it flows easily in cold conditions. The "30" refers to its viscosity at high temperatures, ensuring it remains effective when the engine is hot. This oil is commonly used in a variety of vehicles, providing good protection and performance across different temperatures. It is suitable for both gasoline and diesel engines, making it a versatile choice for many drivers looking to maintain their vehicles efficiently.