Additives include:

Antioxidants: Prevent oxidation and extend oil life.
Anti-Foam Agents: Reduce foam formation for consistent lubrication.
Rust and Corrosion Inhibitors: Protect metal surfaces from moisture-induced damage.
Demulsifiers: Enhance water separation to prevent emulsions.
Anti-Wear Agents: Provide additional protection under high load conditions.
These additives enhance oil performance and protect turbine components.