PEAK ORIGINAL EQUIPMENT TECHNOLOGY Extended Life Orange 50/50 Pre-Diluted Engine Antifreeze + Coolant for North American Vehicles is a premium coolant 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 North American Orange 50/50 Pre-Diluted Extended Life Antifreeze + Coolant formula is an ethylene glycol-based formula specifically engineered for use in any North American vehicle requiring an orange organic acid technology (OAT) formulation, and is designed to provide protection of your vehicle’s engine cooling system metals, including aluminum, against damaging rust and corrosion.