Why is my Subaru always low on oil?
Subaru vehicles are known for their reliability and performance, but some owners may notice that their cars seem to consume more oil than expected. If you’re constantly topping off your oil or seeing the oil light come on, it’s important to understand the potential causes and address them promptly to avoid long-term engine damage. As an experienced auto service provider, I’ll walk you through the common reasons behind this issue and what you can do about it.
Common Causes of Oil Consumption in Subarus
There are several reasons why your Subaru might be running low on oil more frequently than it should. Here are the most common culprits:
- Engine Design: Some Subaru engines, particularly the older models with the EJ and FB series engines, are known for higher oil consumption. This is partly due to their boxer engine design, which can lead to oil pooling in certain areas and being burned off during operation.
- Piston Ring Issues: Worn or faulty piston rings can allow oil to seep into the combustion chamber, where it burns along with the fuel. This is a common issue in some Subaru models and can lead to noticeable oil loss over time.
- PCV Valve Problems: The Positive Crankcase Ventilation (PCV) valve helps regulate pressure in the engine. If it becomes clogged or malfunctions, it can cause oil to be drawn into the intake manifold and burned, leading to oil loss.
- Oil Leaks: External oil leaks are another possibility. Check for oil spots under your car or inspect the engine for visible leaks around the valve cover gaskets, oil pan, or other seals.
- Driving Habits: Aggressive driving, frequent high-speed trips, or towing heavy loads can increase oil consumption, especially in engines that are already prone to burning oil.
How to Address the Issue
If your Subaru is consistently low on oil, here are some steps you can take to resolve the problem:
- Check Your Oil Regularly: Make it a habit to check your oil level at least once a month or before long trips. This will help you catch low oil levels before they cause damage.
- Use the Right Oil: Always use the oil grade and type recommended by Subaru for your specific model. High-quality synthetic oil can sometimes reduce consumption in engines prone to burning oil.
- Inspect for Leaks: Look for visible signs of oil leaks under your car or around the engine. If you find any, have them repaired promptly.
- Replace the PCV Valve: If the PCV valve is clogged or malfunctioning, replacing it can often resolve excessive oil consumption.
- Consult a Professional Mechanic: If the issue persists, bring your Subaru to a trusted auto repair shop for a thorough inspection. A mechanic can check for internal engine issues, such as worn piston rings or valve seals, and recommend the best course of action.
When to Seek Professional Help
While some oil consumption is normal, excessive oil loss can indicate a more serious problem. If you’re adding oil frequently (e.g., more than a quart every 1,000 miles), it’s time to consult a professional. At Kevin’s Autos, we specialize in diagnosing and repairing oil consumption issues in all makes and models, including Subarus. Our experienced technicians can pinpoint the root cause and provide reliable solutions to keep your car running smoothly.
Don’t let low oil levels compromise your engine’s health. Schedule an appointment with us today, and let’s get your Subaru back in top shape!
Frequently Asked Questions
Why do I have to keep putting oil in my car?
One of the most common reasons why cars consume oil is due to normal engine wear and tear. Engine components wear down over time. This wear can lead to small gaps between the parts, allowing oil to seep through and burn off. As a result, drivers must keep adding oil to maintain the proper level.
Why is my car losing oil but no leaks?
If there are no visible external leaks, you are most likely burning oil in the combustion chamber. There are many points of failure that can cause this. Unfortunately, most of the time, this means you will most likely need a rebuild (head or block) or an engine replacement (depending on the point of failure).
Why is my Subaru running out of oil?
There are 6 key factors that can cause your Subaru to guzzle oil more quickly which are as follows: Wear to the seals or gaskets will result in oil leaks. Poor oil quality will burn up faster than high quality oil. Worn piston rings will allow oil to escape and be burned inside the combustion chamber.
Why do I have to keep adding oil to my car?
One of the most common reasons why cars consume oil is due to normal engine wear and tear. Engine components wear down over time. This wear can lead to small gaps between the parts, allowing oil to seep through and burn off. As a result, drivers must keep adding oil to maintain the proper level.
Why do Subarus always leak oil?
Another important reason for Subaru leaks is the valve cover gasket. This gasket can also become deteriorated over time, as the gasket's ability to seal the valve covers can diminish as it shrinks with age and becomes damaged.
Why does the oil in my car keep disappearing?
Oil loss without visible leaks is often due to the engine burning oil, which can happen if faulty parts allow oil to enter the combustion chamber. Worn out piston rings, cylinder walls, or valve seals are common causes of oil burning, leading to reduced oil levels.
What is the most common engine problem in Subaru?
Head Gasket Leaks
One of the most notorious issues plaguing Subaru vehicles is head gasket leaks, particularly in older models with the EJ series engines.
Why is my engine oil always empty?
Oil loss without visible leaks is often due to the engine burning oil, which can happen if faulty parts allow oil to enter the combustion chamber. Worn out piston rings, cylinder walls, or valve seals are common causes of oil burning, leading to reduced oil levels.
Why is my Subaru low on oil?
Oil leaks: If there are leaks in the oil system, it can cause low oil pressure. Make sure to have any leaks repaired promptly. Worn out oil pump: If the oil pump in your Subaru is worn out, it may not be able to pump oil through the engine effectively, causing low oil pressure.
Do Subaru oil pumps go bad?
The oil pump in your Subaru is a critical component responsible for circulating engine oil, ensuring proper lubrication and cooling. When your oil pump begins to fail, it can lead to serious engine problems. In this guide, we'll explore how to identify and address issues with a failing Subaru oil pump.
