Coolant spec Subaru Forester SK (2018–2024) — type, volume, change interval
Which coolant to use in Subaru Forester SK (2018–2024) — type, colour, system volume and replacement interval.
Cooling System Specifications
| Parameter | Value |
|---|---|
| Make / Model | Subaru Forester SK |
| Production Years | 2018–2024 |
| Coolant type | HOAT |
| Colour | blue |
| System volume | 7.0 L |
| Mix ratio | 50:50 (concentrate / water) |
| OEM approval | Subaru SOA868V9210 |
| Replacement interval | every 5 years |
Coolant replacement is time-based, not mileage-based. Corrosion inhibitors degrade over time regardless of how far you drive.
Approved Coolant Brands
Subaru Original, Prestone AF2100, Havoline XLC
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: HOAT.
- 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 HOAT coolant is 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 Subaru Forester SK?
Type HOAT (blue), approval Subaru SOA868V9210. Compatible brands: Subaru Original, Prestone AF2100, Havoline XLC.
How much coolant does a Subaru Forester SK hold?
The total cooling system volume is 7.0 L. A partial change will require less — calculate based on the volume drained.
How often should coolant be replaced in Subaru Forester SK?
Every 5 years, regardless of mileage. Do not delay — depleted coolant causes corrosion of aluminium engine components.
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