What is the oil problem with Subaru?

Subaru’s most discussed oil issue centers on excessive oil consumption observed in certain EJ-series 2.5-liter engines from the late 1990s through the early 2010s. While not universal across the lineup, a notable number of affected vehicles reported rapid oil usage, sometimes requiring frequent top-ups and, in some cases, triggering service actions. Newer Subaru engines have benefited from design updates that address these problems.

Root causes and symptoms

The oil consumption problem is tied to mechanical and design factors in some EJ25 2.5L engines. Worn or improperly sealing piston rings, oil-control rings, and, in some cases, valve stem seals or PCV system components can allow more oil to bypass the combustion chamber or be drawn into the intake. The result can be higher oil burnoff and visible signs such as blue smoke from the exhaust, stronger oil odor, and the need to top up oil between changes. It’s important to note that not every Subaru from those years experiences this issue; it appears most prominently in a specific engine family and production window.

Engines and model years commonly affected

Before listing, this paragraph explains the scope. The oil consumption issue is best documented in the EJ25 2.5L naturally aspirated engine family used in several models around 1999–2010. Reports are less common in newer engine families (such as the later FB/FA 2.0–2.5L designs) that incorporated revised oil control rings and PCV improvements.

• EJ25 2.5L **non-turbo** engines used in models like Outback, Legacy, Forester, and Impreza from roughly 1999–2010.


• Some later revisions of Subaru’s 2.5L family (post-2010) show improved oil-control design, with fewer reports of widespread consumption, though individual cases can occur depending on mileage and maintenance history.

As with any automotive issue, the exact scope varies by region and model year, and some vehicles within these ranges may be unaffected.

Subaru's response and remedies

Subaru has pursued several remedies to address excessive oil consumption in affected engines, including hardware updates and regional warranty actions. The company has issued service campaigns and, in many markets, offered diagnostics and repairs under specific terms and time/engine-mileage limits. Remedies have included revised engine components and, in some cases, engine replacement under warranty or goodwill programs. Diagnostic steps typically involve an oil consumption test and inspection of the PCV system and associated seals to determine whether consumption exceeds acceptable thresholds.

• Warranty campaigns and service programs in various regions to cover excessive oil consumption on identified engine families; coverage terms vary by country, model, and year, so owners should consult their local Subaru dealer for current terms and VIN-specific eligibility.


• Hardware updates: revisions to piston rings, oil-control rings, valve seals, and PCV system components in newer engine revisions, with some cases eligible for short-block or full engine replacement under warranty or owner goodwill programs.


• Dealer diagnostic steps: an oil consumption test (often measured over a defined mileage interval) and inspection of PCV hoses, gaskets, and related components to determine a course of repair if consumption is excessive.

Because coverage and fixes depend on model year and region, owners should contact their Subaru dealer or regional consumer service center to confirm current terms and options.

What owners can do

For Subaru owners who want to stay ahead of potential oil consumption issues, the following steps help monitor and respond effectively.

• Track oil usage between changes: monitor how many miles you drive per quart of oil and compare to typical expectations for your engine family; abnormal consumption warrants a diagnostic check.


• Watch for symptoms: blue or gray smoke on startup or acceleration, a strong oil smell, increased oil spots under the vehicle, or frequent oil-light warnings.


• Get a professional assessment: if you notice excessive consumption, book a visit with a Subaru dealer or qualified shop to perform an oil consumption test and inspect the PCV system and related seals; keep service records and receipts.


• Understand coverage: check whether your vehicle qualifies for regional warranty or goodwill coverage based on model year, mileage, and timing; treatment can range from PCV/system servicing to engine component updates or short-block replacement.


• Use correct maintenance practices: follow Subaru-recommended oil type and viscosity, use high-quality oil, and adhere to service intervals to reduce the risk of developing or exacerbating consumption issues.

Proactive monitoring and timely dealership engagement can help mitigate damage risk and ensure any eligible repairs are covered under the appropriate program.

Summary

The oil problem in Subaru vehicles centers on excessive oil consumption most notably affecting the EJ25 2.5L engine family from the late 1990s to the early 2010s. It surfaced as a widespread owner concern with symptoms like rapid oil loss and exhaust smoke, prompting warranty campaigns and hardware updates by Subaru. While newer engine designs have improved oil-control reliability, owners of older EJ25-based Subarus should stay vigilant, track oil usage, and consult a dealer if consumption becomes noticeable. As always, regional terms and model-year specifics matter, so check with a local Subaru service center for the most accurate guidance.

Do Subarus have a problem with oil leaks?

Yes, Subarus can leak oil, as this is a common issue with the brand, especially as engines age. The most frequent leak points are the valve cover gasket, oil pan gasket, and timing cover, which can fail due to wear and tear. Some newer Subaru engines have also been noted to have specific leaks related to their design.
 
Common causes and locations of leaks

• Gaskets: The most common culprits are failing gaskets. 
  • Valve cover gasket: Oil can leak from the top of the engine. 
  • Oil pan gasket: This can cause oil to drip from the bottom of the engine. 
  • Timing cover: This is another common source of leaks. 
• Modern engine design: Some newer, modern Subaru engines have been specifically noted to have more potential leak points due to their design, with repairs often involving engine removal, according to this YouTube video. 
• Other components: Other parts that can cause oil leaks include the camshaft and crankshaft seals, and the spark plug tube seals. 
• PCV system: A neglected Positive Crankcase Ventilation (PCV) system can increase pressure in the engine, which forces oil past seals and exacerbates leaks. 

What to do if your Subaru is leaking oil

• Check your oil level regularly: Monitor the oil level and top it off as needed between changes. 
• Inspect for leaks: Look for oil spots under your parked car. You can also look for visible signs of a leak, such as oil dripping onto exhaust parts. 
• Address leaks promptly: Have a mechanic inspect and repair the leak as soon as possible to prevent further engine damage. 

Do Subarus have oil problems?

Subaru models often face excessive oil burning and turbocharger seal leaks causing oil loss.

What year did Subarus have oil consumption problems?

Subaru oil consumption issues primarily affect certain models from 2011-2014, including the Forester, Legacy, Outback, Impreza, and Crosstrek, due to a change in piston ring design in their FB engines. Some models, such as the 2015 Forester, were also affected, and the problem can appear in later model years as well. 
Affected model years and models

• 2011-2014 Forester: Particularly with the 2.5-liter engine. 
• 2013 Legacy and Outback: Especially those with 2.5-liter engines. 
• 2012-2013 Impreza: Models with 2.0-liter engines. 
• 2013 Crosstrek: With 2.0-liter engines. 
• 2015 Forester: Specifically with the 2.5-liter engine and manual transmission. 
• 2014-2018 WRX: Some models in this range have also been reported to have this issue. 

Why the problem occurred

• Piston ring design: The issue began with the introduction of the FB engine series in 2011, which used lower-tension piston rings to improve fuel efficiency. 
• Ineffective oil scraping: This new design was less effective at scraping oil from the cylinder walls, leading to it being burned. 
• Sludge and maintenance: Neglecting oil changes can cause sludge to build up, seizing the rings and worsening the consumption problem. 

What to do if your Subaru is consuming oil

• Check your owner's manual: Follow the recommended maintenance schedule and check oil levels frequently. Use the correct type of oil as specified. 
• Monitor for symptoms: Watch for signs like blue smoke from the exhaust, a low oil warning light, or low oil levels between changes. 
• Get a professional diagnosis: If you notice excessive oil consumption, have a mechanic perform an oil consumption test to determine the severity and proper course of action. 
• Contact Subaru: If your vehicle is still under the extended powertrain warranty (8 years or 100,000 miles), a dealer may repair it free of charge. 

What is the most common problem with Subaru engines?

One of the most notorious issues plaguing Subaru vehicles is head gasket leaks, particularly in older models with the EJ series engines. These leaks can lead to coolant loss, overheating, and potential engine damage if left untreated.