Coolant spec Ford Focus IV (2018–2024) — type, volume, change interval
Which coolant to use in Ford Focus IV (2018–2024) — type, colour, system volume and replacement interval.
Cooling System Specifications
| Parameter | Value |
|---|---|
| Make / Model | Ford Focus IV |
| Production Years | 2018–2024 |
| Coolant type | OAT |
| Colour | orange-red |
| System volume | 5.5 L |
| Mix ratio | 50/50 (concentrate / water) |
| OEM approval | Ford WSS-M97B44-D |
| 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
Motorcraft VC-8 / Prestone Ford / Liqui Moly KFS Ford
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: OAT.
- 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 OAT coolant is orange-red. 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 Ford Focus IV?
Type OAT (orange-red), approval Ford WSS-M97B44-D. Compatible brands: Motorcraft VC-8 / Prestone Ford / Liqui Moly KFS Ford.
How much coolant does a Ford Focus IV hold?
The total cooling system volume is 5.5 L. A partial change will require less — calculate based on the volume drained.
How often should coolant be replaced in Ford Focus IV?
Every 4 years, regardless of mileage. Do not delay — depleted coolant causes corrosion of aluminium engine components.
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