I started using this formulation about a year ago and now I can't find it anywhere. Everytime I ask the counter help at the various parts stores they claim that Mobile is "up to something" with that particualr variety of oil and that it is at least temporarily not available for them to purchase at the wholesale level. One guy had received many requests from consumers and after a little digging had concluded that somehow one or more European car manufacterers had made a deal with Mobile to carry it as an exclusive at dealerships only. Has anyone else heard anything along these lines? Obviously I've taken this information (theory) with a grain of salt, but am still frustrated by the lack of availability of this product.