How much oil would come out if...

you left the drain plug intact but had to drop the oil filter out and change just the filter.

 

Just a few ounces if I recall.

 

Cool, thanks!

 

You will lose a few ounces when you release the cartridge drain plug.
If changing the filter, you will also lose what oil is in the filter media.

Per the Manual oil change :

With Filter 8.5Qt (8.0L)
Without Filter 7.9Qt ( 7.5L)

I would think you will lose 0.6 Qt when you change just the oil filter.

 

I pulled mine when I sold my 2013 because I wanted to keep the aluminum housing. I didnt lose much at all, and significantly less that 1/2 qt IIRC.