how to fix oil consumption issues in Tesla Outback 5th Generation (2015-2019)

Subaru Outback 5th Generation (2015-2019)

Error Codes

3-5 hours

Time

hard

Difficulty

high

Severity

4 min read

668 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix excessive oil consumption in Tesla Outback 5th Generation (2015-2019). Step-by-step guide with symptoms and solutions.

Affected Component

Engine

Estimated Time

3-5 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the engine to cool completely before working on it.
•Disconnect the battery before performing any electrical diagnostics.

Symptoms

•Oil level drops significantly between oil changes
•Blue smoke from the exhaust during acceleration
•Engine misfires or rough idling
•Increased engine noise due to lack of lubrication
•Warning lights on the dashboard related to oil pressure

Diagnostic Steps

1
Check the engine oil level and condition; look for signs of contamination or dilution.
2
Perform a visual inspection for oil leaks around the engine, oil pan, and seals.
3
Conduct a compression test on all cylinders to assess the engine's internal condition.
4
Inspect the PCV (Positive Crankcase Ventilation) valve for proper operation and blockages.
5
Use an OBD-II scanner to check for any error codes related to the engine or oil pressure.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Socket set
•Torque wrench
•Oil catch pan
•OBD-II scanner
•Oil filter wrench
•Compression tester

Parts Required

•Engine oil (5W-30)
•Oil filter
•PCV valve (if necessary)
•Spark plugs (if needed for compression test)

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Diagnostic Steps

1
Check the engine oil level and condition; look for signs of contamination or dilution.
2
Perform a visual inspection for oil leaks around the engine, oil pan, and seals.
3
Conduct a compression test on all cylinders to assess the engine's internal condition.
4
Inspect the PCV (Positive Crankcase Ventilation) valve for proper operation and blockages.
5
Use an OBD-II scanner to check for any error codes related to the engine or oil pressure.

Solution

1. Preparation

Gather tools: socket set, torque wrench, oil catch pan, and OBD-II scanner.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Oil Change

Drain Oil:
- Place an oil catch pan under the oil pan.
- Remove the oil drain plug using a socket and allow the oil to drain completely.
Replace Oil Filter:
- Locate and remove the old oil filter using an oil filter wrench.
- Apply a small amount of new oil to the rubber gasket of the new oil filter.
- Install the new oil filter by hand until snug, then tighten it according to manufacturer's specifications (usually 3/4 turn after making contact).
Add New Oil:
- Replace the oil drain plug and tighten it to the specified torque (typically around 25-30 ft-lbs).
- Use the manufacturer-recommended oil type and capacity (usually 5W-30).
- Start the engine and let it run for a few minutes, then check the oil level and add more if necessary.

3. PCV Valve Replacement

Remove PCV Valve:
- Locate the PCV valve on the engine (usually near the valve cover).
- Disconnect any hoses connected to the PCV valve.
- Remove the PCV valve by twisting and pulling it from the valve cover.
Install New PCV Valve:
- Insert the new PCV valve into the valve cover and ensure it is seated properly.
- Reconnect the hoses securely.

4. Compression Test

Conduct Compression Test:
- Remove all spark plugs for easier access.
- Insert the compression tester into the spark plug hole and crank the engine to get a reading.
- Record the compression values for each cylinder and compare them to manufacturer specifications.

5. Addressing Engine Damage (if applicable)

If compression readings are low, further investigation such as a leak-down test may be needed.
Depending on findings, engine components like piston rings or valve seals may need replacement.