Well euro car parts is your best bet as its free delivery unless you know a place to get it from for less than £4.58.
If you want to run on a variable service which is under 9000 miles a year its suggested to run on either 5w40 or you can use 0w40.
And the vehicle takes 4.5 litres with a filter change.
I personally use 0w40 by Mobil 1 New life mainly because of cold start ups or just in general to keep the oil thin as possible to get to the chain tensioner as fast as possible and the oil can move were it needs to be. As well as the fact it comes in 5 litres were as castrol edge is only 4 litre bottle which means you have to buy a 4 litre plus a 1 litre
But in america it is the only oil they use or liqui moly in these engines as they swear by it. But liqui moly is not easily available here.
Also if you car has high oil consumption I find the above oils seem to not "drink or disseapear" as much.lol