Subaru Forester excessive oil consumption and engine knocking while idling on Subaru Forester

Some Subaru Forester owners report experiencing excessive oil consumption, particularly in older models with the 2.5-liter naturally aspirated four-cylinder engine. This issue can lead to significant engine problems, including the need for major repairs or even engine replacement. Contributing factors to this excessive consumption include worn seals or gaskets causing leaks, poor oil quality, worn piston rings, and high oil pressure flooding the engine. Additionally, some owners report hearing engine knocking while idling, which may indicate low oil levels or other serious issues, potentially leading to rough idling, increased fuel consumption, and engine stalling. It is crucial for owners experiencing these symptoms to seek inspection from a qualified technician, especially if they notice unusual sounds or potential leaks. Subaru has implemented measures to address these concerns, including settlements for free oil-consumption testing and extended warranties for affected models. Prompt attention to these issues is essential to prevent further engine damage and ensure the longevity of the Subaru Forester.