Zerex™ G-05® is the automaker approved original chemistry used in newer Ford & Daimler Chrysler automotive and diesel engines. Its hybrid organic acid technology (HOAT) chemistry combines the best of conventional and organic acid-based chemistry to provide the ultimate protection against rust and corrosion. Zerex™ G-05 antifreeze/coolant uses the highest quality virgin ethylene glycol for freeze and improvers protection and a hybrid organic acid corrosion inhibitor package to protect your engines from liner pitting and corrosion.