What To Know About Excessive Oil Consumption In Subarus
Subaru engines have a long history of reliability and longevity - but some 2.0L, 2.2L, and 2.5L engines in certain models built after 2011 have been known to gulp down more engine oil than expected. Let’s break down what’s changed, what’s still worth watching, and what you should do if your Subaru is using oil faster than usual.
Which Models Were Most Affected?
These Subarus models were the most known for the issue:
- Forester: 2011–2015 with 2.5L engines
- Legacy and Outback: 2013–2014 with 2.5L engines
- Impreza: 2012–2015 (2.0L and 2.5L)
- Crosstrek: 2013–2015 (mainly 2.0L)
What Causes The Oil Burn?
Image Credit: Phil Sangwell
Although Subaru has not released an official statement on the matter, numerous netizens and forum contributors have shared online theories about the cause of oil consumption. Based on these posts, reasons may include:
- Worn piston rings or low ring tension – Allowing oil to bypass and burn in the combustion chamber.
- Valve guide seals – Prone to failure over time.
- PCV system issues – Malfunctioning crankcase ventilation can increase oil use.
- Turbocharger wear – On turbo models, oil leaks into the intake/exhaust can add up.
Subaru contends that the oil consumption is within normal ranges - no action needed. Some have thought that perhaps the problem ties back to tighter engine tolerances demanded by federal fuel-efficiency rules, which might’ve affected oil durability in these Subaru engines. However, several technical service bulletins (TSBs) and a class action suit resulted from the issue.
How Subaru Addressed The The Oil Consumption Issue
While burning a bit of extra oil isn’t a dealbreaker, Subaru still made a clear effort to address the concerns:
- TSB Updates: Subaru issued bulletins (TSB 02-157 series) about valve seals, piston rings, and PCV tweaks.
- Customer Assistance: Subaru extended the powertrain warranty to 8 years/100,000 miles for affected models, reimbursed owners for oil expenses, and offered free oil-consumption tests.
- Redesigned Engines: Post-2018 models feature improved piston ring specs, tighter tolerances, and more robust PCV systems. Most newer Subarus show minimal oil usage (about 1–1.5 qt per 6,000 mi) - well within acceptable limits.
Signs You May Still Need To Keep An Eye On It
Even with fixes, here are some symptoms to watch for that could be worth a dealer visit:
| Symptom | Possible Meaning | What You Can Do |
|---|---|---|
| Oil drops more than 1 qt/1k–2k miles | Possibly worn rings, seals, or PCV issues | Have dealer perform oil consumption test and check for TSB repairs |
| Blue-ish exhaust smoke | Could be oil burning in combustion | Check piston rings, PCV; inspect turbo if equipped |
| Check Engine Light | May be triggered by PCV or oil-related fault | Get a diagnostic scan - and address promptly |
What Owners And Buyers Can Do Now
- Check your VIN: See if you're eligible for the extended warranty and TSB coverage.
- Ask for an oil-consumption test: Dealers can perform these for eligible vehicles.
- Stay on top of oil changes: Use Subaru-specified oil and change at recommended intervals.
- Frequent dipstick checks: Use OEM oil; monitor levels regularly
- For newer models: Occasional top-offs are typical for Boxer engines, but anything beyond ~1 qt per 6,000 miles could indicate a problem.
- Buying used? Ensure all TSBs and recall work have been done - it's a strong resale value qualifier.
Oil Maintenance Supplies From Subaru Parts Plus
Subaru has made big strides fixing oil consumption in affected Subarus - but vigilance still pays. Early checking, TSB service, and staying on top of maintenance can keep your engine healthy and performing well beyond the 100K mark. Whether you’re driving a Forester, Outback, Crosstrek, or Impreza, keep checking that dipstick - it just might save you some hassle down the road.
Looking for genuine Subaru engine oil maintenance supplies, PCV valves, piston rings, or diagnostic parts? Browse our collection at SubaruPartsPlus.com. We’re your go-to for genuine OEM parts, fast shipping, and you can contact us for VIN-specific fitment help - so your Subaru gets exactly what it deserves. Shop today!