Old Crows wrote:
So one would think..... We can only pay attention to Mother Benz's recommendations and try to comply. Note that Mother changed the oil specification to 229.52, which gives a slightly better resistance to oil contamination from bio (as I understand it). Also, better resistance to acids. The new specification will allow for longer change intervals.... or, better protection with a shorter change.
So, maybe its not a mechanical issue but one of the oil needing to be upgraded.
The change to .52 was to increase their CAFE numbers. They are 0w oils is the only difference. You can't go any longer oci's on them. You won't notice better mileage but multiplied by 1000's wi ll reduce their CAFE by .00x%?