OK great wise purveyors of the green elixir, I have a question. We just bought a Jeep Liberty CRD but there was no owners manuals. After a little bit of searching I found out that Jeep is recommending Mobil 1 0W40 or 5W40. I think the engine is made in Europe by Motiv? What I was wondering was could I use a VW 506.1 oil which is diesel rated for their engine with unit injectors? Thanks for any input.