Which oil I should use? I have no reference guide in which I could tell what kind of oil to use. I live in Slovenia where lowest temperature is around -15°C and the highest at around 40°C. The thing I am really wondering about is what viscosity level to use.
Would Castrol Edge Turbo Diesel 5W-40 be a good choice or should I go with a 5W-30?
Any help would be appreciated.
Edit: For anyone that's interested in which one I chose, I just went to Castrol Oil Selector, selected my vehicle and got Castrol EDGE 5W-30 LL as a result, I just went with that one as it was 5W-30 as stated on my engine, was for all engine types and supports a wide variety of standards: ACEA C3, MB-APPROVAL 229.31, MB-APPROVAL 229.51, PORSCHE C30, VW 504 00, VW 507 00, FULFILS THE REQUIREMENTS OF THE FORMER VW 503 01 SPECIFICATION.