Does anyone know where I can find the oil capacity for '19 Discovery 3.0L V6?

 

It is in the owner’s manual.

 

Thanks! Is that an app or the mobile based website?

 

As for the Si6, I drained by removing the oil drain plug, and reinstalled with 8.5 quarts and my dash said it was slightly overfilled.
Removed about a third of a quart and it was perfect.
I'd recommend filling with only about 8 quarts and checking the dash then adding as needed.

 

It’s the app

 

Always a best practice to fill it with one less quart/liter than it calls for, and then check before adding any more oil. There are a variety of reasons why you may not get all the previously remaining oil out and that is why you must check before you assume another XX amount of oil should go back in. You're better to be a quart low than you would be to be a quart over the max fill. This is another reason why I like to change the oil myself, most places will not take the time let alone the attention to detail, to get this right.

 

I just did an oil change on my 2019 Si6. First used the MityVac to extract the oil. Replaced oil filter, etc, etc. Then dropped the front skid to drain the oil. I got very little oil coming out the drain plug (in my other post I said 2-3 oz, but I couldn't even get anything to come out of the drain pan, so likely less than 2oz), so much so that I probably won't got to the trouble of doing it again till after 60k miles, just in case. So much easier and cleaner to just extract and then pump to containers for recycling.
Using the extraction pump and top oil filter can make this a 15-20 minute job, and very clean and easy.

I put in 7Qt run it and let it rest, was on the lower red mark when I checked. Added a qt and it ended up on the top, almost too full mark. I would probably start with 7.5 Qts or so next time.