You should use the best oil you can afford. Unfortunately, that's not Commo. You should visit the Castrol web page. You can then enter your reg number and it will give you the oil you need. I use Castrol Edge 0W-30 (as do many others on here).
use a REAL synthetic group IV oil. turbo's need top quality oil to prevent breakdown, in the USA i use Amsoil signature series oils in everything. IMO an 0W oil is not needed unless you get VERY cold weather, i used 10-30 in my modified to almost 300 hp 1.8T jetta-bora for almost 200,000 miles before trading in. a group IV 10-30 uses little to NO weak viscosity index improvers. if its very cold there amsoil's 5-30 signature series has a pour point of -60 F that should suffice. i believe on your side of the pond group III dino oils cannot be labeled synthetic as in the USA, thank castrol-BP for that!!
Can't disagree with that. However, as stated, if you check out Castrol.com and select the oil finder box, it will allow you to input your registration plate for your car and provide you with the correct oil. In my case, a 2011 FJCW, it suggests Castrol Edge 0W-30. I don't know about other parts of the world but Mini in the UK recommends Castrol oils (stamped on the dipstick bracket) and they recommend 0W-30 and that's good enough for me.
Just be careful, Mini is unique. They want/require you to use full Synthetic that meets (BMW LL-01 Specs). NOT ALL SYNTHETICS DO. The oil from your Mini dealer does so does 0w-40 Mobil 1 European Formula (hard to find). I have used AMSOIL and ROYAL PURPLE for years on other vehicles but dont even know if they meet the Mini Specs! Someone else mentioned about the Turbo.... Yes Turbo's spin just a little and get a little warm you could say HeHe. So be careful, do your Mini research. I should check AMSOIL & ROYAL PURP, GREAT OILS AND EASY TO GET!!!!
from what i read oils labeled synthetic in europe must be real-group IV + or V oils. in the USA group III highly refined dino oils are legally "synthetic". as long as you meet the spec any brand is good. my 2012 triumph bonneville recommended mobil I in the book, triumph got a "deal" with castrol now and thats their recommendation now. a quality group IV + or V oil is money well spent IMO!
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