The 4.6-liter Northstar V8 typically requires about 5 quarts of engine oil when performing a full oil change with a new filter; without replacing the filter, the figure is around 4.5 quarts. Always confirm with the vehicle’s owner’s manual for your exact year and model.
Standard oil capacity for the Northstar 4.6L
The Northstar’s oil capacity is commonly cited with two figures: the total needed when using a fresh oil filter and the amount if the filter is not replaced. The standard, widely accepted figure is about 5 quarts of oil with a new filter installed. This ensures the oil pan and passages fill to the correct level after a change.
Note: Oil capacity can vary slightly depending on model year, presence of an oil cooler, and filter choice. The figures below reflect the typical specifications used across many 4.6L Northstar installations.
- With replacement of the oil filter: 5 quarts
- Without replacement of the oil filter: 4.5 quarts
After pouring in the oil, allow it to settle for a few minutes and then check the dipstick. If the level is below the Full mark after settling, add in small increments until it reads correctly.
Model-year variations and practical tips
Most 4.6L Northstar engines share the 5-quart-with-filter baseline, but some variations can exist due to specific vehicle configurations or aftermarket filters. Always confirm with your vehicle’s manual or a GM service bulletin for your exact year, model, and regional specifications. If you are reusing an older filter or switching to a different filter, start with 4.5 quarts and top up as needed after the engine runs and settles.
Summary
For a 4.6L Northstar engine, plan on about 5 quarts of oil when changing the oil with a new filter, and about 4.5 quarts if the filter is not replaced. Verify with the manual and use the dipstick to confirm the correct level after a change.