Green coolant, also known as traditional or conventional coolant, contains a mixture of ethylene glycol or propylene glycol, water, and additives. It is typically green in color but can sometimes be blue. This type of coolant is commonly used in older vehicles and is compatible with copper and brass radiators.

Pros:

• Cost-effective: Green coolant is generally more affordable than other types.
• Widely available: It can be found in most auto parts stores and service centers.
• Compatible with older systems: If you have an older vehicle, green coolant is likely to be compatible with your radiator system.

Cons:

• Shorter lifespan: Green coolant typically needs to be replaced every two years or 30,000 miles due to its lower corrosion resistance.
• Requires mixing: Green coolant usually comes as a concentrate that needs to be mixed with distilled water before use.

Red coolant, also known as extended-life or long-life coolant, is formulated with organic acid technology (OAT) or hybrid organic acid technology (HOAT). It is commonly used in newer vehicles and can be either red or orange in color.

Pros:

• Longer lifespan: Red coolant provides extended protection and can last up to five years or 150,000 miles, depending on the manufacturer's recommendations.
• Enhanced corrosion protection: It offers improved corrosion resistance, which helps protect modern aluminum engine components.
• Pre-mixed options available: Unlike green coolant, red coolant is often available in a pre-mixed form, saving you the hassle of mixing it with water.

Cons:

• Higher cost: Red coolant is generally more expensive than green coolant due to its advanced formulation.
• Not compatible with all systems: It's essential to check your vehicle's manufacturer recommendations to ensure compatibility.

Mineral water, or distilled water, is not a coolant by itself but can be used in conjunction with coolants as a diluent or in emergencies. It is free from minerals and impurities, making it less likely to cause scale or corrosion buildup within the radiator system.

Pros:

• Widely available: Mineral water is readily available at grocery stores, making it easily accessible in case of emergencies.
• Low cost: It is inexpensive compared to coolant options.
• Suitable for emergencies: If you encounter a situation where your coolant levels are low, and you have no other options, adding mineral water can temporarily help prevent overheating.

Cons:

• Lack of corrosion protection: Using mineral water alone without proper additives does not offer corrosion protection or other benefits provided by coolants.
• Not recommended for long-term use: Continuous use of mineral water without a proper coolant mixture can lead to engine damage.

Choosing the right radiator water for your car ultimately depends on factors such as your vehicle's age, manufacturer recommendations, and your budget. If you own an older vehicle with a copper or brass radiator, green coolant may be a suitable choice. For newer vehicles with aluminum components, red coolant provides better protection against corrosion. However, always refer to your car's manual or consult a professional to ensure compatibility.