The TD needs such regular oil changes, I'm not sure the oil quality between brands is much of an issue. Any semi synth around 10W40 will be fine for 3000 miles.
It takes approx 6.5l, and the filters cost between £5-10....
Thats been my experience so far, Halfrauds wanted £8 for the filter and then gave me the wrong one anyway lol. Only one they had listed for that engine mind. But was wrong.They gave me a refund despite the filter being messy from the garage trying to fit it.
Garage charged £5 for the filter and £25 for the oil and labour.
I think that's nice and easy for me.
But if i can buy bulk oil cheap an get filter in internet pre delivered etc, then i could make a saving of a little.
However, for the sake of convenience, i may end up taking it to the same garage and just make sure they use 10w40 semi-syth.
Its negligible for savings really.
Halfords only stock the filter for the earlier U25DT engine, and claim that the later X25DT unit doesn't exist! 
As a cross-reference for your local factors, here's the Fram part no: CH5979ECO
HTH 
Cheers,
appreciated.
When your next oil/filter-change is due, I'd be happy to do it here for you 'at cost' (plus maybe a bottle of Newcastle Brown
).
Normally need a few days prior notice 
Thanks for that offer sethsmate,
I just had it done at local garage cos it was 500 overdue. So not for another 3500 lol.
But by any means, i may well hit you up when that rolls around. I'll store up a few newcastle browns in the mean time
