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Oils & Fluids

Coolant Additives

10 Best Coolant Additives 2025 in the United States

Name: Zerex Asian Vehicle Red Silicate and Borate Free 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA
Brand: Zerex
Price: 17.99 USD
Availability: InStock

From leading brands and best sellers available on the web.

Thorstone No Spill Coolant Funnel Kit, Spill Free Radiator Coolant Filling Funnel, Spill Proof Radiator Funnel Bleeder with Adapters, Automotive Antifreeze Bleeder for Universal Vehicles

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Winner

Zerex

Zerex Asian Vehicle Red Silicate and Borate Free 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA

9.9

score

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Thorstone No Spill Coolant Funnel Kit, Spill Free Radiator Coolant Filling Funnel, Spill Proof Radiator Funnel Bleeder with Adapters, Automotive Antifreeze Bleeder for Universal Vehicles

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Valvoline

Zerex Valvoline DEX-Cool Organic Acid Technology Concentrate Antifreeze/Coolant 1 GA

9.8

score

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Valvoline

Valvoline Zerex G48 Concentrate Antifreeze/Coolant 1 GA

9.7

score

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Valvoline

Zerex G05 Phosphate Free Concentrate Antifreeze/Coolant 1 GA

9.5

score

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Corsair

CORSAIR Hydro X Series, XL8, Performance Coolant, 1L, Translucent Purple

9.3

score

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Prestone

Prestone MAX Asian Red 50/50 Antifreeze Automotive Coolant, Pack of One

9.0

score

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Zerex

Zerex Original Green Low Silicate Concentrate Antifreeze/Coolant 1 GA, 128 Fl Oz (Pack of 1)

8.8

score

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Red Line

Red Line 80204 WaterWetter Super Coolant - 12 Ounce

8.5

score

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Hy-Per Lube

Rislone Hy-per Cool Super Coolant, 16 oz.

8.3

score

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#10

Ford

Genuine Ford Fluid VC-8 Diesel Cooling System Additive - 16 oz.

8.0

score

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10 Best Coolant Additives 2025 in the United States

Thorstone No Spill Coolant Funnel Kit, Spill Free Radiator Coolant Filling Funnel, Spill Proof Radiator Funnel Bleeder with Adapters, Automotive Antifreeze Bleeder for Universal Vehicles

Zerex Asian Vehicle Red Silicate and Borate Free 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA

Thorstone No Spill Coolant Funnel Kit, Spill Free Radiator Coolant Filling Funnel, Spill Proof Radiator Funnel Bleeder with Adapters, Automotive Antifreeze Bleeder for Universal Vehicles

Zerex Valvoline DEX-Cool Organic Acid Technology Concentrate Antifreeze/Coolant 1 GA

Valvoline Zerex G48 Concentrate Antifreeze/Coolant 1 GA

Zerex G05 Phosphate Free Concentrate Antifreeze/Coolant 1 GA

CORSAIR Hydro X Series, XL8, Performance Coolant, 1L, Translucent Purple

Prestone MAX Asian Red 50/50 Antifreeze Automotive Coolant, Pack of One

Zerex Original Green Low Silicate Concentrate Antifreeze/Coolant 1 GA, 128 Fl Oz (Pack of 1)

Red Line 80204 WaterWetter Super Coolant - 12 Ounce

Rislone Hy-per Cool Super Coolant, 16 oz.

Genuine Ford Fluid VC-8 Diesel Cooling System Additive - 16 oz.

FAQ

What are coolant additives used for?

Are coolant additives necessary for my vehicle?

Can I mix different brands of coolant additives?

How often should I add coolant additives?

Do coolant additives improve fuel efficiency?

10 Best Coolant Additives 2025 in the United States

Thorstone No Spill Coolant Funnel Kit, Spill Free Radiator Coolant Filling Funnel, Spill Proof Radiator Funnel Bleeder with Adapters, Automotive Antifreeze Bleeder for Universal Vehicles

Zerex Asian Vehicle Red Silicate and Borate Free 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA

Thorstone No Spill Coolant Funnel Kit, Spill Free Radiator Coolant Filling Funnel, Spill Proof Radiator Funnel Bleeder with Adapters, Automotive Antifreeze Bleeder for Universal Vehicles

Zerex Valvoline DEX-Cool Organic Acid Technology Concentrate Antifreeze/Coolant 1 GA

Valvoline Zerex G48 Concentrate Antifreeze/Coolant 1 GA

Zerex G05 Phosphate Free Concentrate Antifreeze/Coolant 1 GA

CORSAIR Hydro X Series, XL8, Performance Coolant, 1L, Translucent Purple

Royal Purple 01600 Purple Ice Super-Coolant Radiator Additive - 12 oz.

Zerex HD Nitrite Free Extended Life Concentrate Antifreeze/Coolant 1 GA

Niteo Products Motor Medic C1012 Radiator Anti-Rust & Water Pump Lube - 11 oz.

Valvoline Multi-Vehicle 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA, Case of 6

Red Line 80213 Diesel WaterWetter Super Coolant - 15 Ounces

Prestone MAX Asian Red 50/50 Antifreeze Automotive Coolant, Pack of One

Zerex Original Green Low Silicate Concentrate Antifreeze/Coolant 1 GA, 128 Fl Oz (Pack of 1)

Red Line 80204 WaterWetter Super Coolant - 12 Ounce

Rislone Hy-per Cool Super Coolant, 16 oz.

Genuine Ford Fluid VC-8 Diesel Cooling System Additive - 16 oz.

Fuel Additives

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Oil Additives

FAQ

What are coolant additives used for?

Are coolant additives necessary for my vehicle?

Can I mix different brands of coolant additives?

How often should I add coolant additives?

Do coolant additives improve fuel efficiency?