Best Cooling System Additives in 2026

Genuine OEM Dodge/Molar factory fit part

The package length is 5.791 centimeters

The package height is 8.001 centimeters

EXTEND THE LIFE OF YOUR VEHICLE: zMAX Engine & Fuel formulas are simple and easy to use. Micro-lubrication soaks into metal surfaces, which improves lubricity and reduces carbon deposit build-up while boosting performance and protecting vital vehicle parts.

ENGINE EFFICIENCY: Add zMAX Engine Formula to gain efficient combustion resulting in more power. Use the engine treatment at your routine oil change or every 6k miles to reduce engine wear, lower emissions and keep your engine running smoothly.

FUEL CONDITIONER: Pour zMAX Fuel Formula in the fuel tank to lubricate and maintain a clean fuel injector system. It improves fuel efficiency and performance and conditions the pumps and nozzles reducing carbon residue from the valves or pistons.

Replaces fluorescent green-colored V119 premium antifreeze/coolant meeting Ford specification ESE-M97B44-A.Fit Type: Universal

Replaces yellow-colored Motorcraft gold antifreeze/coolant meeting Ford specification WSS-M97B51-A1

Designed to replace additives depleted between coolant change-outs

Unique agent for cooling systems that doubles the wetting ability of water

Rust and corrosion protection allows for use of straight water in racing or reduced antifreeze levels in warm climates

Improves heat transfer and reduces cylinder head temperature

Subaru Genuine Coolant System Conditioner

Specifically formulated for Subaru vehicles

Helps prevent corrosion in your Subaru's cooling system

Contains one application of oil and fuel system UV leak detection dye

For use in engine oil transmissions power steering systems and gas and diesel fuel systems

Compatible with all weights of petroleum based lubricant

Engineered specifically to purge the cooling system before installing new waterless coolant

Seeks out old coolant and water that remain after draining existing antifreeze/water mixture from an engine

Especially important to use when block drains are unavailable or cannot be removed Ensures that the final water content after installing Evans Waterless Coolant meets operating limits

The ALL NEW CarbonClear technology combines the PEA cleaning power you have come to trust with PIBA, and a patented technology for a better clean. The combination of the 3 detergents work synergistically to provide better cleaning power (new formula) vs. just PEA alone (old formula).

Fights ethanol and water corrosion and prevents future carbon build-up

Conditions fuel to help extend the life of key engine parts

Non-toxic

DEX-COOL compatible

Engine application is based on liters of volume in cooling system

Permanent Coolant Leak Repair - Just Shake, Pour And Go.Fit Type: Universal

Mixes With All Antifreeze

No Draining Or Flushing

Seal Conditioner – stops current and prevents future leaks by protecting and reconditioning seals.

Extreme Pressure (EP) and Anti-Wear (AW) Agents – provide excellent metal-to-metal wear protection reducing noise and gear temperatures. Our sulfur, nitrogen and phosphorus additives meet the requirements of API GL-4 and GL-5 specifications.

Friction Modifier – supplements the EP/AW additives to help reduce noise and wear. This in turn helps shifting in a manual transmission and also stops chatter in limited-slip posi-traction axles.

Repairs leaks

Prevents overheating

Extends cooling system life

Rebuilds And Restores Metal Parts And Protects Them From Future Wear.

Anti Friction Modifier. Eliminates Surfaces Defects & Protects From Extreme Heat

Stops Transmission Shudder, Reduces Noise & Vibration. Ultimate Stop Slipping Additive

All 3 Irontite Cooling System Additives in One Box for the Ultimate Fix

Step 1: ThoroFlush - Loosens and Removes Rust, Scale, Grease, Oil and Sludge to Improve Coolant Flow

Step 2: Ceramic Seal - Coats to Fill Cracks and Porousness. Prevents Rust, Corrosion and Leaks

Safely cleans accumulated amounts of varnish, sludge and by-products of combustion

For use in all diesel and gasoline engines

Prepares engine for fresh oil

Klotz KL-600 - Nitro Power Additive Additive 1 Pt

Fast-Acting, Permanent Seal for Cooling System Leaks Contains Effective Water Pump

Product type :AUTO ACCESSORY

Package dimensions :14.986 cm L x18.034 cm W x11.684 cm H

Short Description : Trans Fluid Additive

Unique agent for cooling systems that doubles the wetting ability of water

Rust and corrosion protection allows for use of straight water in racing or reduced antifreeze levels in warm climates

Improves heat transfer and reduces cylinder head temperature

Liqui Moly Diesel Purge, Case of 4

Year:

Make:

Remove rust, scale and sludge from cooling system.

Improves cooling system function.

Extends coolant life.

OE style

Direct fit

Package Dimensions: 38.1 H x 10.2 L x 23.6 W (centimetres)

Prevents overheating

FITMENT | For 1997-1999 Jeep Wrangler TJ 4.0L

OMIX 17118.28 | Cooling System Kit

WARRANTY | Limited 5-Year Warranty

Conditions cooling system

Inhibits rust and corrosion

Lubricates water pump seals