So I’ve read lots of stuff on here, and there appears to be a load of smoke and mirrors, regarding EGR delete, and DPF.
The 4.4 TDV8 is a bloody good engine.
Yes it needs to be looked after….
But, the strangulation that the tree hugging bureaucrats have placed upon it, make longevity, regardless of maintenance almost impossible, if you are driving normally.
If you’re driving long distances daily on Mways no problem.
I blocked off both EGR’s on my 3.6. No need for a remap, and six months later it was running like a dream.
The oil, which I replaced every 3K was almost as viscous as it was beforehand.
Just replaced oil on my 4.4 after 3K.
It was as black as the ace of spades, and thin as you like.
So having found someone who manufactures the perfect blanking plate, I need to know who are the people to go and see to have the EGR mapped out.
I know it’s illegal, but so is my Firestick, and various other things that I have about!

How many of the 3k miles were short journeys.

If the DPF fails to regen it can dump fuel into the oil and could be contributing to what you’re finding.

From what I’ve read on this forum and other cars the dpf failing to regen and short journeys on these cars really isn’t good for the oil and can potentially be blamed for a lot of failures.

I would honestly say that probably half were short journeys. I do a Motorway journey at least once a week, and during this 3K it also included a week touring through Dorset & Devon.
But the 3.6 is much cleaner.
No one will ever convince me, that it’s a good idea for an ICE to lunch on its own exhaust gas.
I don’t think anyone would feel well at all, if they had to breathe their own flatulence all the time.
I’ll carry on replacing the oil & filter every 4K.
It’s far cheaper than a lunched Turbo or two.

Most 4.4 owners never have any issues. The engine was designed to use a DPF and EGR system from teh start. It's also been used in the L405 without any real issues. If it aint broke - don't fix it. 2012 TDV8 Vogue (L322)

I wasn’t disagreeing with your service schedule. If anything I 100% agree

I’m my ownership I’ve done 6k oil changes and kept to 12k for the other filters. Roughly £100 for peace of mind knowing it’s running on fresh oil is definitely worth it in my opinion!