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Cooling System Additives

10 Best Cooling System Additives 2025 in the United States

Name: Archoil AR6500 Diesel Treatment (40.6 oz) - Treats 400 Gallons - Additive for All Diesel Vehicles
Brand: Archoil
Price: 44.95 USD
Availability: InStock

From leading brands and best sellers available on the web.

2 bottles DPF Filter Purge: The Most Economical Way to Clean and Protect Your Diesel Particulate Filter, Diesel Additive, High Performance Helps Regeneration No Assembling 500ml 16.9 oz x 2

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Winner

Archoil

Archoil AR6500 Diesel Treatment (40.6 oz) - Treats 400 Gallons - Additive for All Diesel Vehicles

9.7

score

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2 bottles DPF Filter Purge: The Most Economical Way to Clean and Protect Your Diesel Particulate Filter, Diesel Additive, High Performance Helps Regeneration No Assembling 500ml 16.9 oz x 2

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K-Seal

K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

9.4

score

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Red Line

Red Line 80204 WaterWetter Super Coolant - 12 Ounce

9.1

score

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Bar's Leaks

Bar's Leaks High Mileage Cooling System Repair - 16.9 oz. (Pack of 4),1150-4PK

8.8

score

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Hy-Per Lube

Rislone Hy-per Cool Super Coolant, 16 oz.

8.5

score

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Royal Purple

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

8.2

score

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Ford

Genuine Ford Fluid VC-8 Diesel Cooling System Additive - 16 oz., 2 count.

7.9

score

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Ford

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

7.6

score

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EVANS

EVANS Cooling Systems EC42001 Waterless Prep Fluid, 128 fl. oz.

7.3

score

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#10

PEAK

PEAK Fleet Charge SCA Precharged Concentrate Antifreeze and Coolant for All Heavy Duty Engine Cooling Systems, 1 Gal.

7.0

score

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10 Best Cooling System Additives 2025 in the United States

2 bottles DPF Filter Purge: The Most Economical Way to Clean and Protect Your Diesel Particulate Filter, Diesel Additive, High Performance Helps Regeneration No Assembling 500ml 16.9 oz x 2

Archoil AR6500 Diesel Treatment (40.6 oz) - Treats 400 Gallons - Additive for All Diesel Vehicles

2 bottles DPF Filter Purge: The Most Economical Way to Clean and Protect Your Diesel Particulate Filter, Diesel Additive, High Performance Helps Regeneration No Assembling 500ml 16.9 oz x 2

K-Seal ST5501 Multi-Purpose One Step Permanent Coolant Leak Repair, 8oz, Pour and Go, Mixes with All Antifreeze, No Flushing Required

Red Line 80204 WaterWetter Super Coolant - 12 Ounce

Bar's Leaks High Mileage Cooling System Repair - 16.9 oz. (Pack of 4),1150-4PK

Rislone Hy-per Cool Super Coolant, 16 oz.

MotorPower Care DEF, SCR Additive, Diesel Vehicles, Cleans and Prevent Crystal Formation in Urea DEF, Adblue Additive Cleans Injector and SCR, Enhances DPF Lifespan, 250ml 8.45 oz

Diesel Power Fuel System Cleaner Common Rail Treatment, Lubricant DPF Cleaner 2X Bottle, Diesel Additive

MotorPower Care Diesel System Cleaner and DPF Purge Filter Kit, Diesel Cleaner, DPF Cleaner, Diesel injectors Cleaner, 16.9 oz and 8.45 fl oz

Liqui Moly Radiator Cleaner | 300 ml | Cooler additive | SKU: 2051

Subaru Coolant System Conditioner - SOA635071 - Genuine OEM

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

Genuine Ford Fluid VC-8 Diesel Cooling System Additive - 16 oz., 2 count.

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

EVANS Cooling Systems EC42001 Waterless Prep Fluid, 128 fl. oz.

PEAK Fleet Charge SCA Precharged Concentrate Antifreeze and Coolant for All Heavy Duty Engine Cooling Systems, 1 Gal.

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