10 bestCoolant Additivesof January 2026
112M consumers helped this year.
1
MANNOL 4212 G12 + Ready to USE COOLANT Antifreeze | Extended Service Life up to of Passenger Cars – up to 250 Thousand km| Commercial Vehicles – up to 500 Thousand km | Imported from Germany 5L
MANNOL
9.7
2
Castrol RADICOOL ESSENTIAL
Castrol
9.4
3
Zerex ZXELRU1 DEX-COOL Antifreeze / Coolant - Gallon
Valvoline
9.1
4
![Gulf Kool Guard [3 L] High Performance Radiator Coolant](https://images-proxy.bestreviews.guide/VFqutj4k8hpSkThU_CRQ3-6rT_w=/0x150/https://m.media-amazon.com/images/I/41SFg5wMmxL._SL500_.jpg)
Gulf Kool Guard [3 L] High Performance Radiator Coolant
GULF
8.8
5
Castrol RADICOOL SF-O Premix
Castrol
8.6
6
Red Line Oil 80204 Water Wetter - 12 oz
Red Line
8.3
7
Royal Purple 01600 Purple Ice Super-Coolant Radiator Additive - 12 oz.
Royal Purple
8.0
8
GoMechanic Corecool Coolant Antifreeze Green Concentrate 1:3 Passenger & Commerical Cars (1L)
GoMechanic
7.7
9
MANNOL 4112 AF12+ OAT Organic Acid Technology Concentrated Long-life RED Coolant Fluid 325.3 STJLR.651.5003 SAE J1034 TL 774 GS 94000F Imported from Germany 1 litre
MANNOL
7.4
10
Bosch Tropical Coolant | 1:3 Red | for Cars 1 Liter
Bosch
7.1
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