2018 Mitsubishi Outlander PHEV Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2018 Mitsubishi Outlander PHEV and How to Address Them

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Reviewed by
Aisha
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 2018 Mitsubishi Outlander PHEV 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 2018 Mitsubishi Outlander PHEV 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.

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 2018 Mitsubishi Outlander PHEV?

To effectively diagnose an oil leak in your 2018 Mitsubishi Outlander PHEV, begin with a systematic approach that prioritizes simplicity before delving into more complex diagnostics. Start by locating the leak; inspect the area beneath your vehicle for any oil drips or pooling, and check for oil stains on the engine and surrounding components. Next, assess the oil level to determine if there has been a significant drop, which could indicate a leak. Focus on the oil filter and drain plug, ensuring they are secure and free from leaks, as these are common culprits. Additionally, examine the gaskets and seals within the engine, such as the valve cover and oil pan gaskets, for signs of wear or damage. If the source of the leak remains elusive, consider using UV dye in the oil, which can help illuminate the leak under a UV light. Should these steps not yield results, consulting a professional mechanic is advisable for a thorough inspection and expert guidance on repairs. This methodical approach not only helps in identifying the leak but also ensures that you address the issue efficiently and effectively.

What are the common causes of oil leaks in a 2018 Mitsubishi Outlander PHEV?

When dealing with oil leaks in a 2018 Mitsubishi Outlander PHEV, it's crucial to understand the common culprits that may be at play. One frequent issue is a degraded or damaged oil pan gasket, which can wear out over time and lead to leaks. Similarly, a worn-out valve cover gasket can also contribute to oil escaping from the engine. Another potential source of leaks is a faulty oil filter; if the filter is improperly installed or defective, it can result in oil seeping out. Additionally, a loose or damaged oil drain plug can create a pathway for oil to leak from the oil pan. Lastly, cracks in engine components, such as the engine block or cylinder head, can be serious and lead to significant oil loss. Addressing these issues promptly is essential to maintain your vehicle's performance and prevent further engine damage. Regular inspections and maintenance can help you catch these problems early, ensuring your Outlander PHEV runs smoothly.

How urgent is it to address the oil leak in my 2018 Mitsubishi Outlander PHEV?

Addressing an oil leak in your 2018 Mitsubishi Outlander PHEV is not just a matter of routine maintenance; it is an urgent issue that requires immediate attention. Ignoring an oil leak can lead to severe engine damage due to a loss of lubrication, which increases friction and heat within the engine. This not only diminishes engine performance and efficiency but also compromises your vehicle's overall driving experience. Moreover, the safety risks associated with oil leaks cannot be overlooked; leaking oil can drip onto hot engine components, significantly raising the risk of a fire. Over time, a persistent oil leak can result in a drastic reduction in oil levels, potentially leading to catastrophic engine failure. Therefore, it is crucial to address any signs of an oil leak promptly to safeguard your vehicle's performance and ensure your safety on the road.

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