I have read the posts on the German Castrol synthetic 0w30 which is different from the US stuff. I also have linked, in another topic an Australian website that indicates that the Castrol 5w30 is an ACEA A3. The Syntec 5w30 available here is A1. Is this just Castrol or is this common to most companies. Are we being shafted, or am I putting too much into the ACEA ratings? Here is the Australian link again. Austrailian Castrol