Subaru’s diesel engines are becoming even more frugal and clean for the 2012 model year, with the added benefit of even better torque at low and mid speeds – and smoother gear changing.

Both Forester and Outback 2.0D variants benefit from even better fuel efficiency – 6.2 per cent improved in the combined cycle - and lower emissions, thanks to engine and six-speed manual gearbox refinements.

The Model Year 2012 diesels now produce 350 Newtonmetres of torque at 1600-2400 rpm, compared to 1800-2400 rpm in the last model year. The result: better pulling power in the low and mid speed ranges.

Multiple changes, including a new cam profile, have achieved improvements ranging from turbo efficiency to lower friction.

Other changes include an over-revving warning, a gear shift down indicator.

Forester 2.0D Premium also gets a new luminescent instrument cluster.

Improved gear change is achieved in both Outback and Forester diesels through several refinements including low friction bearings and lower spin loss.

Nick Senior, Managing Director, Subaru Australia, said: “Diesel variants now represent up to 20 per cent of respective Forester and Outback range sales.

"These significant refinements to engine and transmission make an even more compelling case. The smoother gear change helps more efficient driving and better fuel economy, which is a major focus for Subaru diesel customers.”