Detergent-dispersant additives (DD additives) are widely used in modern motor oils. Detergents are ash additives and dispersants are ashless additives. Some of the most common metal-containing detergents used in the world are meta alkylphenolates, primarily calcium, barium, and magnesium alkylphenolates, which have a high degree of detergent properties. This is due to the broad spectrum of operating properties, relative availability of the initial stock, and simplicity of the manufacturing technology.