Mack Trucks is introducing proprietary Bulldog-branded coolants.

Mack Bulldog Coolants are designed for use in a wide variety of cooling system applications, including on-road, off-road and stationary engine applications, and vehicles fueled with gasoline, diesel and natural gas. They provide outstanding corrosion protection for aluminum, brass, cast iron, steel, solder and copper, and reduce hard water scale formation.

Mack Bulldog Extended Life Coolant: This carboxylate-based, organic additive technology contains nitrite and delivers a service life of 600,000 miles or 12,000 hours or 48 months, with no extender needed. It is silicate- and phosphate-free, and can be distinguished by its red color.

Mack Bulldog Heavy-Duty (HD) PF Coolant: This fully formulated, phosphate free coolant contains a dose of supplemental coolant additives. It offers a service life of 300,000 miles or 6,000 hours or 24 months and has a purple or fuchsia color.

Available as part of Mack's integrated product offering, Mack Bulldog coolants were also developed to meet or exceed the requirements of the American Society for Testing and Materials (ASTM) (ASTM D6210 and ASTM D3306), Technology & Maintenance Council (TMC) (TMC RP329 and TMC RP351), and most other major engine and truck original equipment manufacturers. Mack Bulldog Extended Life Coolant also meets the Caterpillar EC-1 requirements.