[Chriztofor]

By the way, here is my e-mail to Royal purple. If they respond, I will post it.

Hello,

I have a 2006 BMW 325i. As per the owner's manual, it requires LL-01 oil. There are two oils that carry this certification Castrol 0w-30 and Mobil 1 0w-40. Does your oil carry a LL-01 certification? If not why not? If you claim that Royal Purple exceeds manufacturer's specs. Can you be more specific.

For example, Castrol 0w-30 and Castrol 5w-40, does not meet API SN, does not meet SM, meets SL, SJ, ACEA A3, B3, and B4. Castrol 0w-30 is LL-01 approved and Castrol 5w-40 is not LL-01 approved. Therefore, I have to go with 0w-30 because BMW requires LL-01 oil.

Also, Castrol 10w-40: MEETS API SN, SM, SL, SJ, ACEA A3, B3, and B4 but it is not LL-01 approved. This oil meets two other criteria API SN and SM more than 0w-30 and 5w-40 and it is not LL01 approved. Since Castro's 10w-40 EXCEEDS 0w-30 but is NOT LL-01 certified I still have to use Castrol 0w-30 as per BMW.

With that in mind, here is my question. Why should I use royal purple over Castrol 0w-30 and/or Mobil 1 0w-40 when they are both LL-01 (Longlife) approved?

Thank you!

Your future customer,
Chris