VW 507 00 approval does not permit a 40-grade. Which highlights the near stupidity of designating allowed grades in these approvals since the minimum HT/HS is 3.5, same as 502 00 for example. I also don’t believe it has C30 approval either.The ESP X3 0-40 has the MB 229.52 and the Porsche C30 but NOT the VW 507 Diesel spec?? On Mobil's site it also says "no retailers found". I buy the ESP 5-30 just for the Audi 507 approval.