Coolant spec Mazda 6 GJ (2012–2022) — type, volume, change interval
Which coolant to use in Mazda 6 GJ (2012–2022) — type, colour, system volume and replacement interval.
Cooling System Specifications
| Parameter | Value |
|---|---|
| Make / Model | Mazda 6 GJ |
| Production Years | 2012–2022 |
| Coolant type | FL22 |
| Colour | dark blue |
| System volume | 7.5 L |
| Mix ratio | 50/50 (concentrate / water) |
| OEM approval | Mazda KJ01 77 235 |
| Replacement interval | every 4 years |
Coolant replacement is time-based, not mileage-based. Corrosion inhibitors degrade over time regardless of how far you drive.
Approved Coolant Brands
Mazda FL-22 / Febi Mazda / Liqui Moly KFS Mazda
Mixing Rules
- Do not mix different coolant types (G11/G12/G13) — mixing causes a chemical reaction and sludge formation.
- When topping up, use the same type: FL22.
- Always dilute concentrate with distilled water at a ratio of 50/50.
- Freeze protection at 50/50 mix: approximately –37°C.
Checking Coolant Level and Condition
- Check the level in the expansion tank on a cold engine — it should be between MIN and MAX marks.
- Fresh FL22 coolant is dark blue. Brown, cloudy or sediment-filled coolant must be replaced immediately.
- Hydrometer test: density at 50/50 mix should be 1.060–1.080 g/cm³.
FAQ
Which coolant should I use in Mazda 6 GJ?
Type FL22 (dark blue), approval Mazda KJ01 77 235. Compatible brands: Mazda FL-22 / Febi Mazda / Liqui Moly KFS Mazda.
How much coolant does a Mazda 6 GJ hold?
The total cooling system volume is 7.5 L. A partial change will require less — calculate based on the volume drained.
How often should coolant be replaced in Mazda 6 GJ?
Every 4 years, regardless of mileage. Do not delay — depleted coolant causes corrosion of aluminium engine components.
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