PEAK Original Equipment Technology Extended Life Violet 50/50 Pre-Diluted Antifreeze + Coolant for European vehicles is a line of premium coolants specifically designed to match the technology and color requirements of European vehicles and is formulated with the same corrosion inhibitor technology that protected your vehicle straight from the factory. PEAK OET European Violet Extended Life 50/50 Pre-Diluted Antifreeze + Coolant formula is an ethylene glycol-based formula engineered for use in any European vehicle requiring a violet silicate-enhanced organic acid technology (Si-OAT), and is specifically designed to provide protection of your vehicle’s engine cooling system metals against damaging rust and corrosion.