Specially designed for heavy duty diesel engines, ACDelco Extended Life Nitrite Free (OAT) Coolant/Antifreeze Pre-diluted 50/50 is a red, ethylene glycol based coolant/antifreeze that features a proprietary Organic Acid Technology (OAT) formula. The advanced formula is nitrite, phosphate, silicate, and borate free. In place of these traditional coolant/antifreeze components, ACDelco Extended Life Nitrite Free (OAT) Coolant/Antifreeze Pre-diluted 50/50 uses proprietary organic acid corrosion inhibitors that provide outstanding long term wet sleeve liner cavitation and corrosion protection of all cooling system metals. This formula also meets many European, Japanese and heavy duty truck manufacturer requirements (OEMs). ACDelco Extended Life Nitrite Free (OAT) Coolant/Antifreeze Pre-diluted 50/50 is premixed with deionized water and is perfect for use in on-the-go situations.

Protect your engine from overheating for up to 1,000,000 miles with ACDelco Extended Life Nitrite Free (OAT) Heavy Duty Coolant/Antifreeze. Complete with advanced Organic Acid Technology (OAT), ACDelco Extended Life Nitrite Free (OAT) Heavy Duty Coolant/Antifreeze eliminates the need for additives or special filters to save you time and money. The specialized formula will protect your cooling system for that extra mile without losing any corrosion support. Give your heavy duty cooling system top of the line, long lasting, total protection with ACDelco Extended Life Nitrite Free (OAT) Heavy Duty Coolant/Antifreeze.

ACDelco offers a full range of oils, fluids, and vehicle care products to protect, enhance, and maintain your automobile. From adhesives, sealants, and cleaners to lubricants, waxes, and paints, ACDelco has all you need to keep your GM or non-GM vehicle looking and performing great.