SLX 0w-30 now equals Syntec 0w-30, but only in North America. Where you are, it may be different. And even in NA, if it doesn't say "Made in Germany" on the label, it's still the old Castrol Syntec 0w-30, not the new Formula SLX.
Anyone find this out west? My local Autozone got in new 0W-30..red labeled bottles. Labels match German made, except it says Made in USA with domestic and foreign components.