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How much oil does a 4.2 L inline 6 take?

Most 4.2 L inline-6 engines require roughly 5.5 to 6.0 quarts (approximately 5.2 to 5.7 liters) of oil for a full change with a new filter. The exact capacity varies by the engine variant, oil pan size, and whether the filter is replaced, so always verify with the owner's manual or a dealer.


Oil capacity by variant


Variations exist across brands and generations; below are typical ranges for common 4.2 L inline-6 configurations.



  • Most 4.2 L inline-6 engines designed for passenger vehicles generally require about 5.5–6.0 quarts (5.2–5.7 L) of oil when performing an oil change with a new filter.

  • Some variants with larger oil pans or different filter setups may require up to about 6.5–7.0 quarts (6.2–6.6 L).


Note: These figures are approximate; refer to the factory manual or service bulletin for your exact VIN-specific capacity.


How to fill and verify the correct oil level


Use these steps to ensure you reach the proper level after an oil change. The process is the same across most 4.2 L inline-6 engines, but follow the exact guidance in your manual.



  1. Prepare the vehicle, warm the engine, then turn off and let it drain for a few minutes.

  2. Remove the drain plug and allow the old oil to drain completely; replace the drain plug.

  3. Install a new oil filter if you’re replacing it during the change.

  4. Begin by adding about 5.5–6.0 quarts (5.2–5.7 L) of oil, then stop and recheck.

  5. With the engine off, pull the dipstick, wipe it clean, reinsert, and read the level. If below the full mark, add small amounts and recheck until you reach the full mark.

  6. Run the engine for 1–2 minutes, turn it off, wait a moment, and recheck the level again; top off if necessary and look for leaks.


Overfilling can cause foaming and other issues, so aim for the correct mark and avoid adding oil beyond what is needed.


Summary


In short, a typical oil fill for a 4.2 L inline-6 is around 5.5–6.0 quarts (5.2–5.7 L) with a new filter, though some variants may require up to 6.5–7.0 quarts depending on pan size and filter configuration. Always confirm the exact capacity for your specific vehicle in the owner’s manual or a factory service bulletin, and verify the fill with the dipstick after the change and a short engine run.

How much oil does a 4.2 inline 6 take?


Capacity: 7 quarts (with filter).



How many quarts of oil does a 4.0 inline 6 take?


Six cylinder engines which is what this is this is a 4.0 uh they want six quarts of oil which is 5.68 L of oil guys. So these jugs are 5 L.



How much oil does a 1989 Jeep Wrangler 4.2 take?


5.8 quarts (with filter).



How much oil does a 4.2 take?


The "4.2 oil capacity" is not a single value, as it depends on the vehicle. For example, a 2001-2003 Ford F-150 with a 4.2L engine uses 6 quarts of oil with a filter change, while a 2006 Chevrolet Trailblazer with a 4.2L engine uses 7 quarts. A 1989 Jeep Wrangler with a 4.2L engine uses 5.8 quarts. Always consult your vehicle's owner's manual for the correct oil capacity. 

  • Ford F-150 (2001-2003): 6 quarts (with filter)
  • Chevrolet Trailblazer (2006): 7 quarts (with filter)
  • Jeep Wrangler (1989): 5.8 quarts (with filter)

Note: The oil capacity can vary significantly by make and model. Always check your owner's manual for the most accurate information for your specific vehicle.


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.