2018 Chevrolet Sonic Is Leaking Oil

Discover the Common Causes of Oil Leaks in Your 2018 Chevrolet Sonic and How to Fix 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 Chevrolet Sonic 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 Chevrolet Sonic 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 are the initial steps to diagnose the oil leak in a 2018 Chevrolet Sonic?

To effectively diagnose an oil leak in your 2018 Chevrolet Sonic, start by thoroughly inspecting the engine and its components for any visible signs of oil. Pay close attention to the oil pan, oil filter, and valve cover gasket, as these are common culprits for leaks. Checking the oil levels is crucial; if they are low, it may indicate a leak that needs addressing. Look for oil stains or puddles beneath the vehicle, as these can provide clues about the leak's location. If you find that the drain plug is loose, tightening it may resolve the issue, while a damaged oil pan gasket will require replacement. By systematically examining these areas, you can pinpoint the source of the leak and take appropriate action, ensuring your vehicle remains in optimal condition.

What are the common causes of oil leaks in a 2018 Chevrolet Sonic?

When dealing with oil leaks in a 2018 Chevrolet Sonic, it's essential to understand the common problems that can arise. One frequent culprit is the oil pan gasket, which can degrade over time, leading to leaks that may require replacement. Additionally, worn oil seals, particularly around the crankshaft and valve cover, can deteriorate and allow oil to escape, necessitating inspection and possible replacement. Another issue to consider is the oil drain plug; if it is loose or damaged, it can result in significant oil loss from the oil pan. Furthermore, a cracked or improperly installed oil filter can also be a source of leaks, as oil may seep from the filter housing. Lastly, overfilling the engine with oil can create excess pressure, causing various seals and gaskets to fail. Regular maintenance and timely inspections are crucial in preventing these issues, ensuring your Chevrolet Sonic remains in optimal condition.

How urgent is it to address the oil leak in my 2018 Chevrolet Sonic?

Addressing an oil leak in your 2018 Chevrolet Sonic is not just a matter of routine maintenance; it is a critical issue that demands immediate attention. An oil leak can lead to a significant drop in oil levels, which compromises the lubrication of essential engine components, increasing the risk of wear and tear. Over time, this can escalate into severe engine damage, resulting in costly repairs or even complete engine failure. Moreover, an oil leak poses a serious safety hazard, as oil can drip onto hot engine parts, creating a fire risk. By monitoring and promptly addressing any signs of an oil leak, you not only safeguard your vehicle's performance but also ensure your safety on the road. Therefore, it is imperative to take action as soon as you notice any symptoms of an oil leak to prevent further damage and maintain the longevity of your Chevrolet Sonic.

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2018 Chevrolet Sonic Oil Leak Causes & Repair Costs