The company first introduced the 1.8-liter Subaru CB18 engine at the 2019 auto show and so far only puts it on two of its models: the second-generation Levorg station wagon and the fifth Forester. This turbo unit is distinguished by the ability to work in a particularly economical Lean Burn mode.
In 2020, a new 1.8-liter turbo engine debuted on the second generation of the Levorg model. And this is a 4-cylinder boxer unit with direct fuel injection, an aluminum block, an open cooling jacket, a pair of aluminum DOHC heads without hydraulic lifters, a timing chain drive and a proprietary AVCS type variable valve timing system. A small Garrett M12 turbine with a conventional air intercooler is responsible for supercharging.
There is also a rather short crankshaft with thin cheeks, which is installed with desaxage, a modern variable displacement oil pump and piston cooling nozzles. Also, the unit can operate in the economical Lean Burn mode, that is, on a lean mixture.
The CB line includes only one internal combustion engine.
The engine was installed on:
- Subaru Forester 5 (SK) since 2020;
- Subaru Levorg 2 (VN) since 2020;
- Subaru Outback 6 (BT) since 2021.
Specifications
| Start of production | 2020 |
| Displacement, cc | 1795 |
| Fuel system | direct injection |
| Power output, hp | 177 |
| Torque output, Nm | 300 |
| Cylinder block | aluminum H4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 80.6 |
| Piston stroke, mm | 88 |
| Compression ratio | 10.4 |
| Features | no |
| Hydraulic lifters | no |
| Timing drive | chain |
| Turbocharging | Garrett M12 |
| Recommended engine oil | 0W-16, 0W-20 |
| Engine oil capacity, liter | 4.3 |
| Fuel type | petrol |
| Euro standards | EURO 6 |
| Fuel consumption, L/100 km (for Subaru Levorg 2021) — city — highway — combined |
9.8 6.4 7.3 |
| Engine lifespan, km | ~200 000 |
| Weight, kg | 125 |
Disadvantages of the CB18 engine
- This turbo engine has just appeared and there are no intelligible statistics of malfunctions, so we can only assume potentially problematic areas of this engine: these are thin chains in the timing drive or a variable displacement oil pump, and also the recommended type of lubricant 0W-16, whether the owners will encounter with oil burner.
