10 Best Heavy Duty Vehicle Antifreeze, Coolant & Diesel Exhaust Fluid 2025

Looking for the best Heavy Duty Vehicle Antifreeze, Coolant & Diesel Exhaust Fluids on the market? Look no further than our Top 10 Product Reviews, where we've tested and scored products ranging from a 7.2 up to an impressive 9.8. And the clear winner? Honda's Genuine COOLANT (Type-2) (OL999-9011). Not only did it score the highest, but it's also the perfect choice for any heavy-duty vehicle. Made with the highest quality ingredients, including anti-corrosion agents and lubricants, this coolant will keep your engine running smoothly and efficiently. Don't settle for anything less than the best, choose the Honda Genuine COOLANT for your heavy-duty vehicle needs.