G11, G12 and OAT Differences in Antifreeze Selection

Antifreeze is one of the most important components of the engine cooling system. It doesn't just prevent freezing in winter; it prevents overheating in summer, prevents corrosion, and contributes to water pump lubrication. Proper antifreeze selection can extend engine life for years.

G11 (IAT - Inorganic Acid Technology)

Traditional green-colored antifreeze containing inorganic inhibitors such as silicon, phosphate, and nitrite. Forms a protective layer on all metal surfaces. Should be changed every 2 years. Suitable for older model vehicles and copper/brass radiator systems.

G12 / G12+ (OAT - Organic Acid Technology)

Red or pink colored organic antifreeze using organic acid inhibitors that activate only at corrosion points. This makes it longer-lasting - can be used up to 5 years. Ideal for modern vehicles with aluminum radiators. Should not be mixed with G11.

Concentrate or Ready-to-Use?

Concentrate antifreezes are diluted with purified water and can be mixed at different ratios for different regions. Ready-to-use antifreezes come pre-mixed at the factory and can be filled directly. While concentrate is preferred for industrial and marine applications, ready-to-use is more practical for individual users.

Alcheron Antifreeze Series

Alcheron offers a wide antifreeze range in G11 green and G12 red formulations, with both concentrate (-78°C) and ready-to-use (-37°C and -56°C) options. All our products are manufactured in compliance with international quality standards.