Subaru's EE20 engine was a horizontallyopposed (or 'boxer') fourcylinder turbodiesel engine. For Australia, the EE20 diesel engine was first offered in the Subaru BR Outback in 2009 and subsequently powered the Subaru SH Forester, SJ Forester and BS EE20 diesel engine underwent substantial changes in 2014 to comply with Euro 6 emissions standards – these changes .