Each Zerex product uses a unique chemical technology, IAT, OAT, HOAT, or NOAT, to match OEM specifications and provide the right balance of cooling, corrosion protection, and long-life performance.
The table below summarizes all major Zerex coolants, including their chemistry type, color, mixing ratio, freeze and boil protection, and recommended vehicle applications.
Zerex Coolant Chart
| Zerex Product | Chemistry / Type | Color | Mix Ratio | Freeze / Boil Protection (Approx.) | Recommended Applications / OEM Use |
|---|---|---|---|---|---|
| Zerex Original Green | IAT | Green | 50/50 or Concentrate | Freeze –34°C / Boil 129°C | Classic vehicles, older domestic cars, light trucks using traditional coolant |
| Zerex Dex-Cool | OAT | Orange | 50/50 | Freeze –37°C / Boil 129°C | GM cars/trucks (1996+), Ford and Chrysler models requiring Dex-Cool |
| Zerex G-05 | HOAT | Yellow / Gold | 50/50 | Freeze –37°C / Boil 129°C | Ford, Chrysler, Mercedes-Benz, Jaguar, Land Rover |
| Zerex G-48 | Si-OAT | Blue | 50/50 | Freeze –37°C / Boil 129°C | BMW, Mercedes-Benz, Mini, Volvo, older VW |
| Zerex G-40 | Si-OAT / NOAT | Violet / Pink | 50/50 | Freeze –37°C / Boil 129°C | Audi, VW, Porsche, Mercedes (G-12++ / G-40 spec) |
| Zerex G-30 | OAT | Pink / Red | 50/50 | Freeze –37°C / Boil 129°C | VW, Audi, Skoda, SEAT (G-12 spec) |
| Zerex G-12 EVO | Advanced Si-OAT | Purple | 50/50 | Freeze –37°C / Boil 129°C | Latest VW and Audi models with G-12 EVO standard |
| Zerex Asian Vehicle Blue | Phosphated HOAT | Blue | 50/50 | Freeze –37°C / Boil 129°C | Honda, Subaru, Suzuki, Mazda |
| Zerex Asian Vehicle Red | Phosphated HOAT | Red | 50/50 | Freeze –37°C / Boil 129°C | Toyota, Lexus, Nissan, Hyundai, Kia |
| Zerex Asian Vehicle Pink | Phosphated HOAT | Pink | 50/50 | Freeze –37°C / Boil 129°C | Toyota and Lexus (Super Long Life formula) |
| Zerex American Vehicle | HOAT | Yellow / Gold | 50/50 | Freeze –37°C / Boil 129°C | Ford, GM, and Chrysler vehicles (post-2000) |
| Zerex European Vehicle Blue | Si-OAT | Blue | 50/50 | Freeze –37°C / Boil 129°C | BMW, Mercedes-Benz, Volvo, Mini (G-48 spec) |
| Zerex European Vehicle Violet | Si-OAT | Violet | 50/50 | Freeze –37°C / Boil 129°C | Audi, VW, Porsche, Mercedes (G-40 / G-12++) |
| Zerex HD Extended Life (ELC) | OAT | Red / Yellow | 50/50 | Freeze –37°C / Boil 129°C | Heavy-duty diesel engines (Cummins, Caterpillar, Volvo, Freightliner) |
| Zerex HD Nitrited OAT | NOAT | Pink / Red | 50/50 | Freeze –37°C / Boil 129°C | On-highway diesel trucks, wet liner protection |
| Zerex HD Nitrite-Free (NF OAT) | Nitrate-Free OAT | Orange | 50/50 | Freeze –37°C / Boil 129°C | Mixed fleets, off-road and construction equipment |
| Zerex Super Extended Life (SCA-Free) | OAT | Red | 50/50 | Freeze –37°C / Boil 129°C | Heavy-duty applications needing long-life coolant |
| Zerex Racing Super Coolant | Performance HOAT | Clear / Light Blue | 50/50 | Freeze –37°C / Boil 132°C | High-performance engines, racing and modified vehicles |
| Zerex HD Fully Formulated Diesel Coolant | IAT | Green | 50/50 | Freeze –34°C / Boil 129°C | Older heavy-duty diesel systems using low-silicate antifreeze |
| Zerex HD Nitrited 50/50 | NOAT | Pink | 50/50 | Freeze –37°C / Boil 129°C | Construction, agriculture, industrial diesel engines |
| Zerex HD Extended Life NF 50/50 | Nitrate-Free OAT | Orange | 50/50 | Freeze –37°C / Boil 129°C | Heavy equipment, buses, long-haul trucks |
| Zerex Heavy Duty SCA Pre-Charged | Conventional IAT | Green | 50/50 | Freeze –34°C / Boil 129°C | Diesel engines using supplemental coolant additive (SCA) |
| Zerex Super Duty ELC | OAT | Red | 50/50 | Freeze –37°C / Boil 129°C | Mining, power generation, and extreme-duty vehicles |
| Zerex HD Extreme OAT | OAT / NOAT Hybrid | Purple | 50/50 | Freeze –37°C / Boil 129°C | Next-generation diesel and mixed fleet applications |
| Zerex Universal 50/50 | HOAT (Universal) | Yellow | 50/50 | Freeze –37°C / Boil 129°C | All makes and models; general top-off use |
Related Coolant Mix Ratio Chart(For All Coolant Types)
Understanding Zerex Coolant Types
Each Zerex coolant is made for a specific vehicle type and cooling system design:
- IAT (Inorganic Additive Technology): Uses silicates and phosphates to protect metal surfaces. Ideal for older engines or vehicles originally designed for conventional green coolant.
- OAT (Organic Acid Technology): Provides long-life corrosion protection using organic acids. Found in most modern GM vehicles and heavy-duty applications.
- HOAT (Hybrid OAT): Combines the benefits of OAT with silicates for faster protection. Used in many Ford, Chrysler, and Mercedes-Benz vehicles.
- NOAT (Nitrited OAT): Enhanced for heavy-duty diesels with wet liners and added nitrites for liner pitting protection.
- Phosphated HOAT: Common in Asian vehicles, uses phosphates for aluminum and corrosion protection.
Related 60/40 Coolant Mix Chart(Complete Guide)
Key Facts About Zerex Coolants
1. Color Codes Help Identify Chemistry
Zerex uses distinct colors—green for IAT, orange for OAT (Dex-Cool), yellow or gold for HOAT, blue/red for Asian vehicles, and violet for modern European coolants. However, always check the label; color alone is not a guarantee of compatibility.
2. Mix Ratio and Performance
The standard mix is 50% coolant and 50% water, providing freeze protection to about –34°C and boil protection up to around 129°C. Some climates may use 60/40 for extra freeze resistance.
3. OEM Compatibility
Zerex coolants meet or exceed a wide variety of OEM standards, including:
- Ford WSS-M97B51-A1
- Chrysler MS-9769
- GM 6277M (Dex-Cool)
- Mercedes-Benz MB 325.3 / 325.5
- VW TL-774 G / F / J
- ASTM D3306 and D6210
4. Heavy-Duty Diesel Protection
Zerex heavy-duty and extended-life coolants prevent liner pitting, scaling, and corrosion in diesel engines. These are ideal for fleets, agriculture, and industrial vehicles where uptime is critical.
5. Don’t Mix Incompatible Coolants
Mixing different coolant chemistries (e.g., OAT with IAT) can reduce performance and protection. If switching, completely flush the system before refilling with a new Zerex type.
6. Maintenance Tip
Even long-life coolants need periodic inspection. Check pH level, color clarity, and coolant level regularly to ensure full protection against corrosion and overheating.
Related PEAK Coolant Compatibility Chart(For All Products)
Final words
The Zerex Coolant Chart above serves as a quick reference for identifying which Zerex product best matches your vehicle’s cooling system requirements. Whether you drive a compact sedan, a European luxury car, or a heavy-duty diesel truck, there’s a Zerex formula designed for it.
Choosing the correct coolant chemistry ensures your engine operates at the ideal temperature, resists corrosion, and delivers long service life.
