What is the oil capacity of a supercharged series II Buick 3800 v6 engine?

To find out, park the car on a level surface, drain the oil and remove the filter. Install a new filter, and pour in 4 quarts of the correct weight oil. Start the engine and run for 1 minute. Shut off and wait 30 minutes. Check the oil level and add until it is at the full mark. You now know the capacity.