All, I live in CT and am working with my State Representative to pass a bill to require posting the diesel cetane rating at the pump (as is the case for octane in gasoline) as well as regulate the use of "Premium Diesel." We should know what we're paying for and be able to compare prices / cetane rating. I encourage you to also contact your State Representative to do the same. Several states require posting the cetane rating, and "Premium Diesel" generally means having a cetane rating >/ 47 as well as meeting other / ASTM D975 / NIST 130 standards. Also: Be sure to check out toptiergas.com which is referenced in my '12 VW Owner's Manual for approved gasoline for VW (as well as BMW, Toyota, Honda, GM, and others). I realize we use diesel and IMHO, if these companies meet strict gasoline requirements, they likely also include a full additives package for diesel.