edyvw
$50 site donor 2025
They have to. All of them do it that way. When one gets a document that oil is approved, there is an expiration date of approval.Do the formulations have to be retested every time MB 229.52 is updated? I doubt it. I would think they are only tested at the time of the formulation.
Mobil1 ESP 0W30 has been approved for MB229.52 for some time. When approval expires, MB won't issue new just bcs. the old one expired. Changes in approval, if there are any, must be addressed, if not, the manufacturer wants to know that oil formulation was not changed.
Besides that, that still does not means Mobil1 ESP was not meeting all these requirements even before test was introduced.
Pennzoil Platinum Euro 5W40 was meeting API SP requirements even before API introduced SP.