Moto-oil.co.uk, great oil, great prices and great customer service!
If anyone wants a really good deal on oil then give these guys a go Oil for car | Oil car | Car engine oil | Synthetic engine oil | Engine oil diesel | Synthetic motor oil | Car motor oil | What engine oil | Which engine oil, please like their page on Facebook too https://www.facebook.com/HelloMotoOil?fref=ts
Speak to Sebastian, really good knowledgeable chap who sells a good range of oil at great prices.
I picked up 5 litres of Castrol Edge Professional 5w-30 for £45 yesterday, opted for that but he also had the Edge SLX for £35 for 5 litres which is also up to VAG Spec for Longlife Service, just this minute finished doing an oil change on the A3, first time I have done it and felt very rewarding to be fair, going to do this in between each Longlife service from now on.
Next oil service at Audi I will buy my oil from these guys and take it with me, should knock around £35-£40 off the service cost.