Which type of additive does 2190 carry?

The correct answer highlights that 2190 is an additive which functions as an Extreme Pressure (EP) agent. Extreme Pressure additives are specifically designed to provide protection under conditions of high load and high stress, typically found in components such as gears and bearings. They help to form a protective film on metal surfaces, preventing metal-to-metal contact, which can cause wear and damage under extreme conditions.

Understanding the function of Extreme Pressure additives is crucial when working with lubricants and additives in gas turbine systems, as they significantly enhance the performance and longevity of the machinery.

Other additive types, such as antioxidants, are primarily used to prevent oxidation and degradation of the oil, viscosity index improvers are aimed at enhancing the consistency of the lubricant across temperature changes, and detergents are intended to keep engine components clean by preventing deposit formation. Each has its own role, but for 2190, it is the Extreme Pressure properties that are most relevant, providing the necessary protection in high-load scenarios.