PEAK® ORIGINAL EQUIPMENT TECHNOLOGY Extended Life Gold 50/50 Pre-Diluted Engine Antifreeze + Coolant for North American Vehicles is a premium coolant is specifically designed to match the technology and color requirements of your North American vehicle and is formulated with the same corrosion inhibitor technology that protected your vehicle straight from the factory. PEAK OET Gold 50/50 Pre-Diluted Antifreeze + Coolant is an ethylene glycol-based formula engineered for use in any North American vehicle requiring a Gold hybrid organic acid technology (HOAT) formulation. This low silicate formula with deposit control additives protects against wet sleeve liner cavitation and scale formation, and contains organic acid corrosion inhibitors, stabilized silicate and a nitrate/nitrate combination that provides complete corrosion protection for both gasoline and diesel engines.