Guys, like Denis was saying. Do not confuse petrol with diesel engine. You cannot compare Skylines, Evos and STIs with 220 diesel. On my side i will always go for what manufacturer recommend and i had many cars driven over 200000km without any engine or turbo problems. Anyway, the oil i trust the most is Castrol, not Mobil, not Aral. Liqui Molly is getting better and better lately, but again, if i get this oil here in Romania it has nothing to do with same oil same type in Germany. Totally different quality.