2015 Audi S8 Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2015 Audi S8 and How to Address Them Effectively

Find Repair Location
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 Audi S8 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 Audi S8 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.

An oil leak may be noted on the ground where the vehicle is parked. However, many vehicles have plastic trays underneath the engine that may catch leaking oil and conceal the leak. In such cases, a low oil level, a burning oil smell, or even smoke from oil burning in the engine bay may be noted.

»MORE: Signs of a bad oil pan gasket

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 steps should I take to diagnose the oil leak in my 2015 Audi S8?

To effectively diagnose an oil leak in your 2015 Audi S8, begin by visually inspecting the area beneath your vehicle for any signs of oil pooling or dripping, as this can help you pinpoint the leak's location. Next, turn your attention to the engine components, particularly the oil pan, valve cover gasket, oil filter, and oil drain plug, as these are common culprits for leaks. Regularly checking your oil level is also crucial; a significant drop may indicate a leak that needs immediate attention. Pay special attention to the oil filter, ensuring it is secure and free from damage, as a faulty filter can lead to leaks. Additionally, examine the oil pan for any visible cracks or loose bolts that could be contributing to the issue. Look for oil stains or residue around gaskets and seals, as these can provide clues to the leak's source. If your efforts do not yield results, or if the problem seems complex, consulting a mechanic or an Audi dealership is advisable for a comprehensive diagnosis. By following this systematic approach, you can effectively identify and address the oil leak in your Audi S8, ensuring your vehicle remains in optimal condition.

What are the common causes of oil leaks in a 2015 Audi S8?

When dealing with oil leaks in a 2015 Audi S8, it's crucial to understand the common problems that may arise. One frequent issue is the degradation of valve cover gaskets, which can lead to oil seepage as they age. Additionally, the oil pan gasket is another area to inspect, as wear and damage can result in leaks from the oil pan itself. Another potential culprit is the camshaft tensioner gasket, known for its tendency to fail in certain models, causing oil to escape. The oil filter housing gasket is also susceptible to deterioration over time, contributing to leaks in the engine bay. Lastly, a leak from the rear main seal can occur as this component wears out, allowing oil to escape from the engine. Addressing these issues promptly is essential to prevent further damage to the engine and maintain optimal vehicle performance. Regular maintenance and inspections can help identify these leaks early, allowing for effective DIY repairs.

How urgent is it to address the oil leak in my 2015 Audi S8?

Addressing an oil leak in your 2015 Audi S8 is not just a matter of routine maintenance; it is a pressing issue that requires immediate attention. An oil leak can significantly reduce oil levels, leading to inadequate lubrication of engine components, which can cause severe engine wear and tear over time. If left unchecked, this can escalate into more serious problems, such as engine overheating or even catastrophic engine failure, which can be both costly and inconvenient. Moreover, the safety implications of an oil leak cannot be overlooked; oil dripping onto hot engine parts poses a fire hazard, creating a dangerous situation for you and other road users. By prioritizing the repair of an oil leak, you not only safeguard your vehicle's performance and longevity but also protect yourself from potential safety risks. Therefore, it is crucial to act swiftly and address any signs of an oil leak to maintain the health and safety of your Audi S8.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.

2015 Audi S8 Oil Leak Causes & Diagnosis | RepairPal