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How much oil does a 2008 Mercury Mariner 2.3 take?

The 2008 Mercury Mariner with the 2.3-liter engine typically requires about 5 quarts of engine oil when performing a full oil change with a new filter.


In 2008 the Mariner offered two engine options: a 2.3L Duratec inline-four and a 3.0L Duratec V6. The 2.3L engine uses roughly 5 quarts with a filter, while the 3.0L version generally calls for about 6 quarts. Always verify with the owner’s manual or a trusted dealer, as exact capacity can vary based on production date and filter size.


Engine options and oil capacity


The following quick reference outlines the oil capacities for the engines that could be installed in a 2008 Mariner.



  • 2.3L Duratec I4: Approximately 5 quarts (4.7 L) with a new oil filter.

  • 3.0L Duratec V6: Approximately 5.5–6 quarts (about 5.2–5.7 L) with a new oil filter.


For the specific vehicle you own or service, plan on about 5 quarts for the 2.3L engine and verify the exact amount by checking the dipstick after the initial fill.


Practical steps for an oil change


If you’re performing the oil change yourself, follow these practical steps to reach the correct fill and maintain engine health.



  • Use the recommended oil viscosity listed in the owner's manual (commonly 5W-20 or 5W-30, depending on climate and vehicle specifications).

  • Replace the oil filter with a compatible filter designed for the 2.3L Duratec engine.

  • Add about 4.5–5 quarts to start, then run the engine briefly and shut it off. Wait a few minutes for the oil to settle, then check the dipstick.

  • Top up in small increments until the dipstick reads near the full mark.

  • Record the oil change and properly dispose of used oil and the old filter.


Following these steps helps ensure you arrive at the correct oil level and protect the engine from under- or overfilling.


Summary


For a 2008 Mercury Mariner with the 2.3L engine, the typical oil capacity is about 5 quarts with a new filter. Always confirm the exact figure for your specific vehicle variant and consult the owner's manual for the recommended oil viscosity. After an oil change, verify the level with the dipstick and adjust as needed.

What kind of oil goes in a 2008 Mercury Mariner?


The correct oil for a 2008 Mercury Mariner is SAE 5W-20 for most engines, including the 2.3L 4-cylinder with a gas-electric hybrid powertrain. However, if you have a 2.3L 4-cylinder with a gasoline-only engine, you should use SAE 5W-30. 

Engine Type Oil Viscosity
2.3L 4-Cyl (Gas/Electric) SAE 5W-20
2.3L 4-Cyl (Gas Only) SAE 5W-30
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Important considerations
  • Check your specific engine: Always confirm the recommended oil type for your exact engine, as the 2.3L 4-cylinder has two different recommendations based on whether it's a hybrid or gasoline-only. 
  • Oil capacity: The refill capacity is 4.5 quarts for both 2.3L 4-cylinder engines. 
  • Oil type: Both conventional and synthetic oils are acceptable, but synthetic oil is generally recommended for better performance and protection. 
  • After refilling: It's important to check the oil level after refilling to ensure it is at the correct level. 



How many quarts of oil go in a 2008 Mercury Mariner?


The 2008 Mercury Mariner oil capacity depends on the engine: the 3.0L V6 requires 6 quarts (5.7 L) with a filter, while the 2.3L 4-cylinder needs 5 quarts (4.7 L) with a filter. Always check your owner's manual for the most accurate information specific to your vehicle. 

  • 3.0L V6 engine: 6.0 quarts (5.7 L) with filter 
  • 2.3L 4-cylinder engine: 5 quarts (4.7 L) with filter 

To ensure the correct amount, always consult your owner's manual for the specific details of your vehicle's engine, as capacity can vary slightly even between models of the same year.



How much oil does a 2.4 L 4 cylinder engine take?


5.6 quarts (with filter).



How much oil does a 2008 Mercury Milan 2.3 take?


The 2008 Mercury Milan with a 2.3L engine has an oil capacity of 4.5 quarts (with filter). It is recommended to use a 5W-20 viscosity oil for this vehicle. Always check the oil level with the dipstick after refilling to ensure it is at the correct level.
 
This video demonstrates how to change the oil and filter in a 2008 Mercury Milan: 1mDC Auto EnhancementYouTube · May 15, 2022

  • Capacity: 4.5 quarts (including the oil filter). 
  • Oil Viscosity: 5W-20. 
  • Important Note: After refilling, always check the oil level using the dipstick to confirm it is correct before driving. 


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.