WOW, you really did sucked into Scamsoil's lies!!!
First off, they only have one oil that is API certified (XL). Scamsoil is only a blender and packager, they buy their base oil stock from REAL oil companies, so they don't manufacture ANYTHING!!
Second, you have to pay an inflated price for their products, because Scamsoil is a MLM company!
Third, they try to say you can run their oil 25K miles to justify the highly inflated price of their products! Did you know that UOA will not detect a sludging condition with oil (from Blackstone Labs)? Matter of fact, even Scamsoil recommends using their ONLY API certified oil, and changing it at the vehicle manufacturer's recommended OCI in vehicles prone to oil sludging:
http://www.smartsynthetics.com/pdf/TSB-engine-sludge-issues.pdf
Audi, and VW have special requirements for oil in their engines, Mobil-1 meets these requirements, Scamsoil DOES NOT!!!
http://pics.tdiclub.com/data/500/vw_tb_17-05-04.pdf
http://dejong947.com/audi/tsb/audi.tb.17-05-01.pdf