Antifreeze G11, G12, G12+, G12 EVO, P-OAT: Complete Class Guide and How to Choose

Why Color Is Just the Tip of the Iceberg

Choosing antifreeze by color is the most common mistake car owners make. Red, green, blue, or purple shades do not guarantee compatibility with your engine. The key criteria are the additive technology and manufacturer approvals.

In this guide, we’ll cover:

• What G11, G12, G12+, G12 EVO, and P-OAT markings mean
• Which technology to choose for your vehicle
• Which CHEMIPRO products correspond to each class
• How to avoid costly mistakes when replacing coolant

Antifreeze Classification: From G11 to P-OAT

→ G11 (Hybrid OAT) — Classic Technology for Vehicles up to 2005

• Technology: Inorganic inhibitors (silicates, phosphates, borates) — Inorganic Acid Technology (IAT). Creates a protective film over the entire cooling system surface.
• Service Life: 2–3 years or up to 100,000 km.
• Characteristics: Quickly forms a protective film on metal, which is critical for older engines. Less stable at high temperatures; the film degrades over time.
• Color: Green, blue, yellow (color depends on manufacturer and is not a strict classifier)
• Compatibility: Passenger cars up to ~2005, commercial vehicles, motorcycles

CHEMIPRO G11 (IAT) Class Product

→ G12 / G12+ (Carboxylate OAT) – Carboxylate Technology for Modern Engines

• Technology: Organic acids (Organic Acid Technology). Inhibitors work locally, protecting only corrosion sites without creating a thick film.
• Service Life: Up to 5 years or 250,000 km.
• Characteristics: Maximum heat transfer, stability during overheating, ideal compatibility with aluminum radiators.
• Color: Red, pink
• Compatibility: VAG group vehicles, BMW, Mercedes, Ford after 2005

CHEMIPRO G12/G12+ Class Products:

Important: CHEMIPRO carboxylate-based antifreezes contain no methanol or glycerin, eliminating the risk of damage to rubber seals and plastic cooling system components.

→ G12 EVO (Psi-OAT) — Premium Class for Hybrids and Electric Vehicles

• Technology: Advanced carboxylate formula with added phosphates and silicates for aluminum protection under extreme loads.
• Unique Advantage: Compatibility with high-voltage electric vehicle systems (optimized dielectric properties).
• Color: Purple / red
• Approvals: TL 774-L, G12 EVO, VW/Audi/Porsche/Bentley
• Service Life: 5 years or 250,000 km

CHEMIPRO G12 EVO Class Products:

Technical Detail: CHEMIPRO G12 EVO antifreeze has passed electrical conductivity tests and is recommended for cooling traction batteries and inverters in hybrid and electric powertrains.

→ P-OAT (Phosphate-OAT) — Asian Standard for Hyundai, KIA, Toyota

• Technology: Phosphate-carboxylate composition specifically developed for Asian operating conditions (high humidity, sharp temperature fluctuations).
• Key Difference: Optimized protection against cavitation and corrosion of aluminum alloys.
• Color: Red
• Application: Japanese and Korean vehicles: Toyota, Mazda, Mitsubishi, KIA, SsangYong

CHEMIPRO P-OAT Class Products:

Important: CHEMIPRO P-OAT antifreezes fully comply with Korean and Japanese automaker specifications, confirmed by declarations of conformity and laboratory tests.

Antifreeze Selection Algorithm: 5 Steps to the Right Choice

Step 1. Check Your Vehicle Owner’s Manual

Find the “Cooling System” or “Technical Fluids” section. Look for:

• Manufacturer approval (e.g., VW TL 774-F, Toyota TSK 26016)
• Recommended technology (OAT, Hybrid OAT, Lobrid)
• Required freezing point

Step 2. Determine Engine Type and Year of Manufacture

Vehicle Type / Recommended CHEMIPRO Class

• Passenger car up to 2005 / G11
• Passenger car 2005–2020 / G12 / G12+
• Premium VAG, Porsche / G12 EVO
• Asian brands / P-OAT
• Commercial vehicles / G11/G12 Concentrates

Step 3. Choose Format: Concentrate or Ready-to-Use Solution

Concentrate — more economical for:

• Fleet operators and service stations (up to 30% savings on bulk purchases)
• Regions with extreme climates (precise temperature adjustment possible)
• Those who prefer using high-quality distilled water

Ready-to-Use Solution — ideal for:

• Retail customers (“pour and forget” principle)
• Emergency replacement on the road
• Guaranteed correct proportions

Step 4. Check Compatibility When Topping Up

Never mix antifreezes of different technologies!

Hybrid OAT + Carboxylate = sediment formation, radiator clogging.

Safe CHEMIPRO Combinations:

All products of the same technology (e.g., two carboxylate-based)

G12 EVO is compatible with G11, G12, G12+, G13

Important: When switching to a different technology, cooling system flushing is mandatory

Step 5. Record the Replacement Date

CHEMIPRO antifreeze service life — up to 5 years when following maintenance schedules. Set a calendar reminder or use service stickers.

Why CHEMIPRO Antifreezes Are the Professional Choice

• Quality Control at Every Stage
• All formulas are developed in our own R&D center; production is ISO 9001 and ISO 14001 certified.
• Universal Applicability
• CHEMIPRO products are suitable for most European, Asian, and American vehicles.
• Savings Without Compromise
• CHEMIPRO concentrates yield up to 120 liters of ready-to-use antifreeze from a single 60-liter container.
• Environmental Safety
• No methanol, glycerin, or heavy metals — safe for people and the environment.
• 5-Year Warranty

When replacement schedules are followed, CHEMIPRO guarantees cooling system protection throughout the entire service interval.

Checklist: What to Check Before Purchase

• I found the manufacturer approval in the manual
• I identified the technology: IAT / Carboxylate OAT / Psi-OAT / P-OAT
• I chose the format: concentrate or ready-to-use solution
• I checked the freezing point for my region
• I verified that the CHEMIPRO product matches the required class (see table above)
• I saved the article number for repeat purchase: CH_____

Conclusion: It’s Not About Color, It’s About Technology

Remember: Antifreeze is not just “freeze protection fluid.” It’s a complex chemical compound that protects your engine from corrosion, cavitation, overheating, and deposits.

Choosing CHEMIPRO antifreeze gives you:

• Scientifically proven formula tailored to your engine type
• Compliance with international standards and OEM approvals
• Cost optimization through concentrates and bulk volumes
• Support from CHEMIPRO technical specialists for product selection