Castrol EDGE 0w-30 SPT Synthetic Motor Oil has been loved and raved about by European car owners for a decade now.  It is one of Castrol's premier products in that it meets so many tough European specifications including Mercedes-Benz 229.5, BMW LL-01, VW 505.00, and VW 502.00.These specifications all speak to the quality of the product. In particular, Mercedes-Benz 229.5 (used in the majority of gasoline engine Mercedes cars the past decade) is particularly tough to meet.The product has often been referred to as German Castrol because for many years it was produced in Germany.  Now, you may still find it made in Germany, but some cases are showing up from Belgium.  Rest assured, it is still the high quality product meeting the tough European specifications no matter where it is produced.The low pour point of this product, approximately -50 Degree Centigrade suggests it has a significant percentage of Group IV Synthetic base stock in its formulation. Group III base stock is also high quality today, but the fact remains that Castrol is putting very high quality ingredients into this premier product. Of course, the oil companies today never tell us the exact formulation, so we can only take best guesses. Nevertheless, it is clear that it is a high quality product no matter what base stock is used because it does officially meet the tough European specifications listed on the bottle.When you have a European vehicle and you use a motor oil that meets the manufacturer specifications, you can feel comfortable going to the full maintenance interval recommended by your manufacturer under normal conditions.This is a highly recommended product. Depending on price and your personal preferences, Mobil 1 0w-40 is another terrific option that meets the same specifications as well as a few additional ones.Note - This product seems similar to Castrol's new 0w-40 product.  One difference though is that Porsche requires a 40 weight, so the 0w-40 product meets Porsche specification while this 0w-30 product does not.