Cannot find the required product? Contact us!
Motul Concentrate Coolant – Precise Mixing for Climate & OEM Chemistry
Concentrate coolant gives you full control over freeze and boil protection by selecting the exact water ratio for your climate and load profile. It is the preferred option for workshops, fleets and enthusiasts who service multiple vehicles or travel between hot summers and sub-zero winters. To unlock its benefits, you must use demineralised/distilled water and measure accurately—tap water adds minerals that form scale and reduce heat transfer. Choose Motul concentrate in the correct chemistry for your vehicle (OAT, HOAT or manufacturer-specific) and perform a complete flush when changing types. After filling, bleed the system thoroughly to remove air pockets that cause hot spots, erratic heater output and potential head-gasket stress. Properly mixed and maintained, concentrate coolant protects mixed metals, seals and the water pump over long service intervals while maintaining stable operating temperature under heavy towing or technical off-road climbs.
In this section: Browse all categories • Quick Comparison • Fitment & Compatibility • How to Choose • Care & Mixing • Upgrade Sequence Roadmap • Related • FAQ
Quick Comparison – Typical Mix Ratios
| Ratio (Coolant:Water) | Typical Protection | Use Case | Notes |
|---|---|---|---|
| 40:60 | Moderate freeze/boil protection | Mild climates | Better heat transfer; check OEM minimums |
| 50:50 | Balanced protection (common) | Most regions | Often the default OEM recommendation |
| 60:40 | Enhanced freeze/boil margin | Severe cold or heavy towing | Do not exceed OEM maximum concentration |
Buyer’s Checklist
- Confirm chemistry (OAT/HOAT) and any manufacturer approvals
- Use demineralised/distilled water only
- Measure total system capacity (engine + heater + expansion tank)
- Adjust ratio for climate while staying within OEM limits
- Replace the pressure cap if in doubt—affects boiling point and bleed
Fitment & Compatibility
- Do not mix OAT with incompatible silicate-rich or conventional coolants
- If switching chemistry, perform a thorough flush and rinse
- Check hose material and gasket compatibility for your platform
- Record batch and ratio on a service label under the bonnet
Care & Mixing
- Pre-mix outside the vehicle to the exact ratio before filling
- Bleed the system using factory procedures; some cars have bleed screws
- Heat-cycle, cool down and recheck level; top up with the same mix
- Test protection with a refractometer or hydrometer seasonally
Upgrade Sequence Roadmap
- Identify current coolant chemistry and contamination level
- Choose Motul Concentrate that matches OEM chemistry
- Flush, back-flush the heater core, and rinse with demineralised water
- Fill with your chosen ratio, bleed thoroughly and pressure-test for leaks
- Document ratio/date and check again after the first long drive
Related
FAQ – Concentrate Coolant
- Can I use tap water to mix?
- No. Minerals in tap water cause scale and reduce heat transfer—use demineralised/distilled water.
- Is more concentrate always better?
- No. Over-concentration can reduce heat transfer and may violate OEM limits—stick to recommended ratios.
- Do I need to flush when changing brand?
- Yes when chemistry differs; even within OAT families, a flush ensures inhibitor compatibility.
- How do I bleed stubborn air locks?
- Elevate the front, use bleed screws, squeeze hoses gently and run the heater at max to purge the core.
- What’s the easiest way to measure capacity?
- Consult service data and log the amount drained; capture the heater core volume by opening the heater circuit.
- Can I premix and store it?
- Yes in clean, sealed containers; label the ratio and keep away from contamination and sunlight.
There are no products to list in this category.