2015 Buick Regal Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2015 Buick Regal and How to Fix Them

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
80% chance it's the
Oil System Components
0%
20% chance it's the
Engine Gaskets
The most common reasons a 2015 Buick Regal is leaking oil are oil system component failure and leaking engine gaskets.
  • Oil System Components: A worn or damaged oil pump or filter can lead to low oil pressure, resulting in inadequate lubrication and potential engine damage.
  • Engine Gaskets: A worn or damaged engine gasket can lead to oil or coolant leaks, resulting in engine overheating or loss of lubrication.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2015 Buick Regal is leaking oil?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

Oil pans don't wear out or break like other parts, they generally only need to be replaced because of external damage from an accident or an improperly tightened drain plug. The main symptom you will experience is an oil leak underneath the engine of your car. The oil that leaks from a damaged oil pan will range from dark brown to dark black. If the leak is large enough or occurs for long enough the oil level will be low enough to turn the oil pressure or low oil level warning light on.

A bad oil level sensor may cause a false reading of the engine oil level. The oil level warning light may illuminate even when the oil level (checked manually) is within an acceptable range. The warning light may also come on and off intermittently if the sensor is faulty. An error code may be sent to the PCM and a check engine light may come on the dashboard as well if the sensor is bad.

The engine oil pressure warning light will come on if the engine oil pressure is low, or if the oil pressure sensor is faulty. In either case, engine power may be reduced significantly. The check engine light may also illuminate, and an on-board diagnostic (OBD) trouble code will be stored in the vehicle's computer.

What are the potential causes and diagnostic steps for an oil leak in a 2015 Buick Regal?

When tackling an oil leak in your 2015 Buick Regal, it's essential to adopt a systematic diagnostic approach. Start with a thorough visual inspection under the vehicle to pinpoint the leak's origin, as this can often reveal the most apparent issues. Regularly checking your oil levels is also crucial; a sudden drop can indicate a significant leak that needs immediate attention. Next, focus on inspecting the gaskets and seals, particularly the valve cover and oil pan gaskets, for any signs of wear or damage, as these are common culprits. Additionally, examine the oil pan and oil filter area for leaks, as problems in these components can lead to oil loss. Always refer to your vehicle's manual for specific diagnostic procedures tailored to your model. If the problem persists or if you're uncertain about your findings, consulting a professional mechanic can provide clarity and ensure that the issue is resolved effectively. By following these steps, you can confidently diagnose and address oil leaks, maintaining the health of your Buick Regal.

What are the common causes of oil leaks in a 2015 Buick Regal?

When dealing with oil leaks in a 2015 Buick Regal, it's essential to understand the common culprits that may be at play. One of the primary causes is gasket failures, particularly with the oil pan gasket or valve cover gasket, which can deteriorate over time and lead to leaks. Additionally, issues with oil system components, such as a faulty drain plug, oil filter, or turbo oil return flange, can also result in oil escaping from the system. Engine-related problems, including a leaking rear main oil seal or a malfunctioning PCV system, are other significant contributors to oil leaks. It's crucial to address these leaks promptly, as neglecting them can lead to severe engine damage. Regular maintenance checks are vital, as normal wear and tear can exacerbate these issues, making it important for DIY enthusiasts to stay vigilant and proactive in maintaining their vehicle's health.

How urgent is it to address the oil leak in my 2015 Buick Regal to prevent potential engine damage?

Addressing an oil leak in your 2015 Buick Regal is of utmost importance to prevent severe engine damage. Oil plays a critical role in lubricating engine components, and a leak can lead to insufficient lubrication, resulting in increased friction and wear on vital parts. This not only jeopardizes the engine's performance but can also lead to costly repairs or even complete engine failure if left unchecked. Additionally, oil is essential for cooling the engine; a leak can disrupt this cooling process, increasing the risk of overheating and further damaging the engine. Regularly monitoring your oil levels is crucial; a significant drop indicates a serious leak that requires immediate attention. Ignoring these symptoms can lead to dire consequences, making it essential to consult a mechanic as soon as you suspect an oil leak. Prompt action not only safeguards your vehicle's longevity but also ensures your safety on the road.

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