Five quarts of engine oil are typically required when performing a full oil change with a new filter; about 4.5 quarts if you do not replace the filter. Always verify the level with the dipstick after filling.
The 2004 Grand Marquis uses Ford's 4.6-liter modular V8. The exact amount can vary slightly depending on whether the filter is replaced and the amount of oil retained in the old filter, so use these figures as a starting point and confirm on the dipstick.
Before listing any figures, note that the following reflect common practice for a standard oil change on this model.
Note: For the precise quantity for your vehicle, consult the owner's manual or your Ford dealer.
The numbers below are typical for a standard change with a new filter:
- With a new oil filter: 5 quarts total.
- Without replacing the filter: about 4.5 quarts.
After filling, run the engine briefly, turn it off, wait a few minutes, and recheck the level with the dipstick to ensure accurate measurement.
Additional guidance
Oil grade: For most temperatures, Ford typically recommends 5W-30; some climates or engines may allow 5W-20 per manual. Always follow the grade specified for your vehicle.
Summary
In summary, a 2004 Grand Marquis generally takes five quarts of engine oil when performing a full change with a new filter, or roughly 4.5 quarts if the filter is not replaced. Always confirm the level with the dipstick after filling and use the oil grade recommended by Ford for your climate.