I was nerding out on the HPL site after placing a recent order and was reading the data sheets on their Euro oil vs the Supercar oil. They are both obviously formulated with fantastic PAO/Ester base oils, but it seems the Euro has a slightly newer VW additive package vs SuperCar - 504/507 vs 502/505. I full well realize this is all splitting hairs amongst excellent products, but what makes one better for a certain application than the other? Assuming a 0W-30 in both, would one excel or possibly not excel in certain applications versus the other? There is a $2 difference between the two series in a 6qt pack of 0W-30 so that's not even a consideration.