Buying oil in Switzerland...
Which of these is probably the magic sauce?
1. Castrol 0W-30 SLX Professional Longtec BMW VW MB Opel Motoröl - BMW LL 01 , ACEA B4 , Opel GM-LL-B-025 , API SL , API CF , MB 229.3 , VW 502.00 , Opel GM-LL-A-025 , MB 229.5 , VW 505.00 , ACEA B3 , ACEA A3 , VW 503.01...