Valvoline Zerex Asian Vehicle Blue antifreeze concentrate
This is a blue, silicate-free, phosphated HOAT antifreeze that Valvoline developed specifically for Asian vehicles. It is almost impossible to find in Georgia, and we bring it in directly from the United States. The product is a concentrate and must be diluted before filling.
Photographs come from the manufacturer's official materials.
What is different about this fluid
The ordinary antifreeze you can buy in Georgia is built on European logic: it uses silicate to protect aluminium and often contains 2-EHA as well. Asian manufacturers avoid both.
Zerex Asian Blue is a patented formulation (US 5,454,967) that protects aluminium with phosphate. According to the data sheet it contains no silicates, borates, 2-EHA, amines or nitrites.
Service life is 5 years or 240,000 km, and silicon content is under 10 ppm where the JIS K 2234 standard allows 250 ppm.
Why a concentrate is an advantage
Half of a ready-mixed 50/50 fluid is water. Buying a concentrate means you pay neither the price nor the shipping for that water, and you decide what level of protection you need.
One bottle, 1 US gallon (3.78 L) concentrate, yields 7.5 litres of ready-to-use coolant at 50/50. That covers a full fill on most Japanese cars.
Diluting takes two minutes: concentrate first into a clean container, then water, mix thoroughly, and only then fill.
Which vehicles it is intended for
The blue is for late-model Asian vehicles whose factory silicate-free HOAT coolant is blue. Four names are printed on the front of the bottle: Honda, Hyundai, Nissan and Subaru.
The data sheet names Subaru, Honda and Acura, Nissan and Infiniti, Toyota, Scion and Lexus, Mazda, Mitsubishi, Suzuki, Isuzu, Daihatsu and Dae Woo. For Hyundai and Kia MS591-08 the formulation is approved.
For a Subaru the blue is the right choice, because Subaru's factory coolant is blue as well.
If your car's factory fluid is green, meaning a Hyundai, a Kia, a Mazda or a Mitsubishi, your product is Valvoline Zerex Asian Green. If it is pink or red, meaning a Toyota, a Lexus or a Scion, it is Valvoline Zerex Asian Red. We sell all three.
Product photos
Dilution chart
AntifreezeFreeze point
| Antifreeze | Water | Freeze point | Boil point | When to use |
|---|---|---|---|---|
| 33% | 67% | ≈ −18 °C | ≈ 125 °C | Weakest useful mix, for a mild winter |
| 40% | 60% | −24 °C | 126 °C | The minimum on the manufacturer's chart |
| 50% | 50% | −36 °C | 128 °C | Standard, equivalent to factory fill |
| 60% | 40% | −48 °C | 133 °C | High altitude, severe winter |
| 70% | 30% | −67 °C | 135 °C | Maximum protection, more is not better |
The 33 per cent row is not on the manufacturer's chart and comes from the general ethylene glycol curve. Every other row is from the official data sheet. Below 40 per cent the inhibitor concentration also drops, so 33 per cent is for mild winters only.
Technical data
| Part number | 910236 |
|---|---|
| Colour | Blue / ცისფერი |
| Base | Ethylene glycol |
| Technology | HOAT, phosphated organic acid |
| Glycols | 91.0 mass % |
| Corrosion inhibitors | 7.0 mass % |
| Water | 2.0 mass % |
| pH (50% v/v) | 8.4 |
| Reserve alkalinity (RA) | 12 |
| Specific gravity 60/60 °F | 1.1450 |
| Flash point | 121 °C (250 °F) |
| Silicon as Si | < 10 ppm |
| Borates as B | < 10 ppm |
| Chloride | < 10 ppm |
| Ash content | < 5 mass % |
| Boiling point, undiluted | 175 °C (347 °F) |
| Storage stability | 5 years |
What it does not contain and why that matters
- SilicatesSilicate drops out as an abrasive gel that grinds the water-pump seal.
- BoratesBorate accelerates aluminium corrosion, which is why Asian OEMs dropped it.
- 2-EHA2-ethylhexanoic acid is a plasticiser that softens gaskets and plastics. It is present in many cheap “universal” coolants.
- AminesAmines can form nitrosamines together with nitrites.
- NitritesNot needed in a passenger-car aluminium system and attacks solder.
Laboratory test results
Aluminium water pump cavitation (ASTM D2809, 100 h)
- Limit
- Minimum 8
- Actual
- 10, a perfect score
10 means “perfect” and 1 means “perforated”. A direct measure of water-pump survival.
Hot surface aluminium corrosion (ASTM D4340)
- Limit
- Max 1.0 mg/cm²/week
- Actual
- 0.1 mg/cm²/week, ten times better than the limit
This test targets the hottest point of an aluminium head, exactly where aluminium engines fail.
Repassivation of aluminium surfaces
- Limit
- > −400 mV
- Actual
- +447 mV
Means a damaged aluminium surface rebuilds its own protective film.
Foaming (ASTM D1881)
- Limit
- Max 150 ml
- Actual
- 80 ml
Foam is air, and air does not carry heat. It also makes the pump cavitate.
OEM
- Hyundai / Kia MS591-08
- Subaru
- Honda / Acura
- Nissan / Infiniti
- Toyota / Scion / Lexus
- Mazda
- Mitsubishi
- Suzuki
- Isuzu
- Daihatsu
- Dae Woo
- ASTM D3306
- ASTM D4985
- JIS K 2234-1994
- Ford WSS-M97B55-A
- Mitsubishi ES 64-217
- Federal Specification A-A-870A
All technical figures come from Valvoline's official product information sheet. Official technical data sheet (PDF) · Manufacturer page