2018 Ford Fiesta Is Leaking Oil

Discovering the Causes of Oil Leaks in Your 2018 Ford Fiesta and How to Address Them Effectively

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Reviewed by
Devin Cabugcal
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 Ford Fiesta 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 Ford Fiesta 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 Ford Fiesta?

To effectively diagnose an oil leak in your 2018 Ford Fiesta, begin with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Start by parking your vehicle on a level surface and visually inspecting the engine and undercarriage for any visible signs of oil leakage, such as oil spots where you typically park. Next, check the oil level using the dipstick; a low reading may indicate a leak that needs addressing. Pay close attention to the oil filter and drain plug, as these components can often be the source of leaks; ensure they are secure and free from oil residue. Additionally, examine the gaskets and seals around the engine and oil pan for any signs of wear or damage. If the leak remains elusive, consider adding UV dye to the oil and using a UV light to help pinpoint the source. For a more thorough investigation, a pressure test of the oil system can be beneficial. If these steps do not yield results, it may be time to consult a certified mechanic for a professional assessment. By following this diagnostic approach, you can efficiently identify and address the oil leak in your vehicle.

What are the common causes of oil leaks in a 2018 Ford Fiesta?

When dealing with oil leaks in a 2018 Ford Fiesta, 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 valve cover gasket can also be a source of oil leakage, as it may fail to create a proper seal. Another potential problem is a faulty oil filter; if the filter is damaged or not installed correctly, it can easily result in oil escaping. Additionally, pay attention to the oil drain plug; if it is damaged or not tightened properly, it can cause significant leaks from the oil pan. Lastly, inspect for any cracks or damage in engine components, such as the oil cooler or oil seals, as these can also lead to oil leaks. 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, allowing for a more straightforward DIY repair process.

How urgent is it to address the oil leak in my 2018 Ford Fiesta to prevent potential engine damage?

Addressing an oil leak in your 2018 Ford Fiesta is critical to maintaining the health of your engine and preventing costly repairs. Oil serves as the lifeblood of your engine, providing essential lubrication to reduce friction among moving parts. When an oil leak occurs, it compromises this lubrication, leading to increased wear and tear on engine components. If the leak is not addressed quickly, it can result in a significant drop in oil levels, which may cause the engine to overheat. Overheating can lead to severe damage, including warped components and complete engine failure. Additionally, oil leaks can contaminate other parts of the engine, such as spark plugs and the exhaust system, which can further impair performance and lead to additional issues. Ignoring an oil leak can also result in a dangerous loss of oil pressure, which is vital for the engine's operation. This can manifest as engine knocking and diminished performance, ultimately jeopardizing the vehicle's reliability. Therefore, it is imperative to diagnose and repair any oil leaks as soon as possible to ensure the longevity and efficiency of your Ford Fiesta.

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2018 Ford Fiesta Oil Leak Causes & Repair Costs | RepairPal