Have you read here before, AGIP would only offer premium diesels – at the price of normal diesels. Ask me, do they have something to give away or is this just a PR gag? How can the consumer check this? On the homepage they write that there are more cleaning additives in it. Can you believe or not. At least here is also biodiesel in it, so write it themselves. As for the cet number, I have read (here: http://www.motor-talk.de/forum/aral-ultimate-diesel-t5663332.html ), that for example SHELL and ARAL Normal diesels have a higher cet number than this AGIP “Premium” Diesel. Does anyone have information?