The FB25 boxer engine is an aluminum 6-cylinder injector with a nominal displacement of 2498 “cc” and a pair of light cylinder heads, each equipped with two camshafts. Gas distribution scheme – 16-valve DOHC, compression in the range of 10.0-10.3 (after 2014). The camshafts use a dual AVCS system, each driven by a maintenance-free timing chain. Experts recommend buying a used FB25 engine after 2014, when it was modified.
Specifications
| Manufacturer | Gunma Oizumi Plant |
| Also called | FB25 |
| Production years | 2010 |
| Cylinder block alloy | aluminum |
| Fuel system | injector |
| Configuration | boxer engine |
| Number of cylinders | 4 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 90 |
| Cylinder bore, mm | 94 |
| Compression ratio | 10.0 10.3 (2014+) |
| Displacement, cc | 2498 |
| Power output, hp | 172/5800 175/5800 |
| Torque output, Nm / rpm | 236/4100 235/4000 |
| Fuel type | 95 |
| Euro standards | — |
| Weight, kg | — |
| Fuel consumption, L/100 km (for Forester) — city — highway — combined |
10.9 6.8 8.3 |
| Oil consumption, gr/1000 km | up to 1000 |
| Recommended engine oil | 0W-20 / 5W-20 / 5W-30 / 5W-40 |
| Engine oil capacity, liter | 4.8 |
| Oil change interval, km | 15000 (better 7500) |
| Normal engine operating temperature, °C | — |
| Engine lifespan, km — official information — real |
— 300+ |
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