Engine Subaru CB18

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.


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
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.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top