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.

 

You’re right about extraction. It does leave very little oil. (They’ve actually tested it, and what’s left could be measured in spoonfuls.) But there is oil left in the channels underneath the filter cartridge holder. And of course, the filter cartridge itself. {The stuff that’s underneath the filter cartridge on the block—I used to soak up with paper towels until I realized I could use the extraction pump hose and just put it in each little channel and suck up most of the oil in them.}

That’s why your suggestion of adding a quart LESS is an excellent one. (There is actually oil throughout the engine; it does not all drain out 100%) The electronic gauge in the middle actually is 8 ounces or 1 pint under. The top of the gauge is the full mark as long as there’s no message about being overfilled. The advantage of DIY with an extractor; is if you do accidentally overfill, it is easy to remove oil.

Last time I paid someone to change the oil on one of my JLR vehicles they didn’t bother putting on a new washer, and there was always a little oil spot wherever I parked, which really irritated me. They could’ve simply gotten a washer from one of the auto parts shop or I’m sure they had one on hand somewhere. It’s not like they’re expensive. (That was the last of the Ford owned Jaguar XF’s, so it still came with a dipstick on it’s 4.2L NA V-8.)

Moving the cartridge and oil filter up top I think was much better. Besides, you have a vested interest in doing it right! Some technician? Not so much. And Jaguar threatens that you ‘COULD’ lose warranty coverage if you don’t use their specification; because they want you to pay their shop rate and where I’m from it’s $300 an hour!

 

So is it worth it to go underneath and use the drain plug because I'm at 79k and I've only ever extracted on my td6 engine.

 

My 2 cents is:

When your under there doing your oil, you can inspect everything underneath.

That means alot to me. Maybe not so much to others.