The 3.6L holds near 6 quarts.
The engine holds 5.
That is approximately 4.25 quarts if pan is drained, or 9 quarts if whole system including convertor is drained.
5 quarts service fill, 9 quarts dry fill.
Dry fill would be approx 9 quarts, if only filter change approx 5 quarts.
Four quarts unless it is a full teardown then you might include the torque converter
There is no minimum vehicle speed. It goes off of acceleration or deceleration in the crash.
7 quarts 5w20
12 quarts 15w4012 quarts 15w40
4.5 to 5 quarts
5.3 quarts
It goes into the cap on the valve cover.
The fluid goes down the dipstick tube.