As I already said, I use Castrol for almost all my applications privately, and in the workshop....
It's just the missing 5w50 engine oil and Tutela (F1 shift on some models only).
By using Castrol products, you'd gain value and availability over your current choices. But your quality is fine.
Castrol stuff is sold in BP servo's, which makes things easy if (as you should) buy your fuel there.
I get mine through local wholesalers or frustratingly, Supercheap Autos... as they sell magnatec cheaper than my wholsaler claims to buy it for!