I was at my local euro parts store today when I noticed new dark blue 5 liter jugs of Lubro Moly 5w40. While I purchase their full synthetic 5w40 in the purple jug for one of our cars I was a bit curious about this one. Didn't have much english on it but it seemed like it was more aimed towards diesels while the purple 5w40 is a gas/diesel oil. I'm guesing it's a blended synthetic like the Castrol 505.01 VW people have to buy at the dealer and what I did when he had our `04 Jetta TDI wagon.