Subarus are known for their reliability and all-weather performance, but if you’ve noticed your vehicle going through oil faster than expected, it’s worth paying attention. While some oil consumption is normal in any engine, excessive burning can signal developing problems. Ignoring it can lead to bigger issues, including engine damage or costly repairs.
We’ve seen many Subaru owners come in with questions about oil use. Understanding the possible causes and solutions can save you time, money, and frustration in the long run.
Why Subarus Are More Prone to Oil Burning
Subarus are unique in their engineering, especially when it comes to their boxer engine design. Unlike traditional inline or V-shaped engines, a boxer engine has horizontally opposed cylinders. This design offers great stability and a lower center of gravity, but it also means oil tends to settle differently inside the engine. Over time, this can lead to increased oil consumption, particularly if maintenance schedules aren’t followed closely.
Additionally, some Subaru models from the early 2010s are known for having issues with oil control rings or valve seals that make them more likely to burn oil. If your vehicle falls into one of these model years, staying proactive about monitoring oil levels becomes even more important.
Common Causes of Excessive Oil Burning
While Subaru’s unique design plays a role, other factors can accelerate oil loss. Instead of relying on a long list, here are the three most common culprits explained in detail:
Worn Piston Rings or Valve Seals
These components keep oil where it belongs — lubricating moving parts, not entering the combustion chamber. When they wear out, oil slips past and gets burned with fuel, leading to visible smoke and a noticeable drop in oil levels.
PCV System Issues
The positive crankcase ventilation (PCV) system manages pressure inside your engine. A clogged or failing PCV valve can allow oil vapor to get sucked into the intake system, causing faster oil consumption.
Oil Leaks
Sometimes it’s not that your Subaru is burning oil — it’s losing it through leaks. Gaskets, seals, and even timing covers can allow oil to escape. Over time, even small leaks can drain significant amounts between oil changes.
Warning Signs You Shouldn’t Ignore
Recognizing the symptoms early can prevent serious engine damage. Watch out for:
- Blue smoke coming from the exhaust
- A burning oil smell after driving
- Frequent low oil warnings or the oil light turning on
- Reduced engine performance or rough running
If you notice any of these, it’s best to have your Subaru inspected right away before a small issue becomes a major repair.
The Importance of Regular Oil Checks
One of the simplest ways to protect your Subaru’s engine is to check your oil regularly. Even if you haven’t reached your next scheduled oil change, low levels can cause friction and overheating inside the engine.
Subaru owners should make it a habit to:
- Check oil levels every 1,000 miles
- Use manufacturer-recommended oil grades
- Schedule oil changes at proper intervals
By staying proactive, you can avoid running your engine low on oil, which is one of the fastest ways to cause major damage.
Professional Diagnosis and Solutions
Excessive oil burning isn’t always easy to diagnose without professional tools. At RM Automotive, we begin by conducting a thorough inspection to identify the root cause of the issue. Depending on what we discover, solutions might range from replacing a faulty PCV valve or fixing minor leaks to addressing worn piston rings or seals.
In many cases, catching the issue early can save you from extensive engine work. Acting quickly helps preserve performance and prolong the life of your Subaru.
Protect Your Subaru With RM Automotive in Northridge, CA
Your Subaru was built to handle challenging roads and adventurous drives, but it needs proper care to stay reliable. If you’ve noticed higher oil consumption or any warning signs, don’t wait until the problem escalates.
At RM Automotive in Northridge, CA, we specialize in Subaru maintenance and repairs. Our team uses quality parts and advanced diagnostic tools to identify problems accurately and keep your car performing at its best.
Schedule an appointment today and let us help you keep your Subaru running smoothly for every mile ahead.