Coolants

Heavy duty and automotive engine coolants and anti-freeze

You need to know that you can depend on your vehicles to get you and your cargo where you need to go—mile after mile and season after season. Phillips 66 offers premium engine coolants designed to extend the life of commercial and passenger vehicles alike, offering engine protection from temperature extremes, corrosion, scale, rust and premature water pump failure.

Our Guardol OAT (Organic Acid Technology) HD Coolant/Antifreeze offers a heavy-duty, nitrate-free coolant solution for diesel engines on commercial vehicles that offers up to 600,000 miles or 12,000 hours of protection when flushed and filled. Our Shield Coolant/Antifreeze offers a one-size-fits-all solution for passenger cars and light-duty vehicles. This extended-life coolant is available in concentrate and 50/50 prediluted coolant formulations that ensure optimal engine temperature and prevent damage on all vehicle makes and models for up to five years or 150,000 miles when flushed and filled. Get unmatched protection and performance for all your vehicles with our Phillips 66 engine coolant formulations below.