2018 Ford F-350 Super Duty Is Leaking Oil

Identifying the Causes of Oil Leaks in Your 2018 Ford F-350 Super Duty 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 2018 Ford F-350 Super Duty 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 F-350 Super Duty 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 are the steps to diagnose the oil leak in a 2018 Ford F-350 Super Duty?

When diagnosing an oil leak in a 2018 Ford F-350 Super Duty, it's crucial to follow a methodical diagnostic approach that emphasizes simpler checks before delving into more complex solutions. Begin by locating the leak; thoroughly inspect the engine bay and the ground beneath the vehicle for any visible oil stains or puddles, as these can provide immediate insights into the leak's origin. Next, check the oil level using the dipstick; a noticeable drop in oil level may signal a significant leak that needs prompt attention. Focus on the oil filter and drain plug, as these are common sources of leaks; ensure they are properly tightened and free from oil residue. Additionally, examine the gaskets and seals around the oil pan and valve cover for any signs of wear or damage, as these components are often responsible for leaks. If the source of the leak remains unclear, consider conducting a pressure test to help pinpoint hidden leaks. If these steps do not lead to a resolution, it may be wise to consult a mechanic for a professional evaluation. By adhering to this structured approach, you can effectively diagnose and address oil leaks in your Ford F-350 Super Duty.

What are the common causes of oil leaks in a 2018 Ford F-350 Super Duty?

When dealing with oil leaks in a 2018 Ford F-350 Super Duty, it's crucial to understand the common culprits that may be at play. One frequent issue is a degraded oil pan gasket, which can wear down over time, leading to noticeable oil seepage. Additionally, worn valve cover gaskets are another common source of leaks, often resulting in oil escaping from the top of the engine. It's also important to check the oil filter; a faulty or improperly installed filter can easily cause oil to leak. Furthermore, damaged oil cooler lines can contribute to leaks, as they are integral to the cooling system. Lastly, various oil seals, including the crankshaft and camshaft seals, can deteriorate and lead to oil leaks. By being aware of these potential issues, DIYers can take proactive steps to diagnose and fix oil leaks, ensuring their vehicle remains in optimal condition.

How urgent is it to address the oil leak in my 2018 Ford F-350 Super Duty?

When it comes to an oil leak in your 2018 Ford F-350 Super Duty, the urgency to address the problem cannot be overstated. An oil leak not only compromises the lubrication essential for your engine's smooth operation but also poses significant risks that can escalate quickly. Ignoring the leak can lead to a drastic reduction in oil levels, which may result in overheating and catastrophic engine failure, leaving you with costly repairs and potential breakdowns. Furthermore, the safety implications are serious; oil dripping onto hot engine components can create fire hazards, putting both you and your vehicle at risk. By promptly addressing the oil leak, you not only safeguard your engine's performance and longevity but also ensure your safety on the road. Therefore, it is crucial to inspect and repair any oil leaks as soon as they are detected to maintain the reliability and efficiency of your Ford F-350 Super Duty.

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