Originally Posted By: mattwithcats
Castrol EDGE Titanium (gold bottle) is better than the black bottle Syntec...
It's kind of funny because the latest Castrol EDGE (black bottle) now also contains titanium additive.
But as far as which is better, I'd go by the specs that your engine calls for. For example, for those that have Euro cars, the black bottle Castrol EDGE 0w-40 and 0w30 will be "better".