Originally Posted by Diesel12
https://www.lubrizoladditives360.com/daimler-mb-229-51/
I looked up the MB 229.51 Specs from Lubrizol. Here they are-
All the specs listed on lubrizol is a part of ACEA C3 sequence.
Other than full compliance with ALL tests with ACEA C3 sequence , an oil requires passing numerous other MB engine tests to qualify for MB 229.51 approval.
Quote
HTHS-at 150°C CEC L-36-A-90 cP ⥠3.5 SCHAEFFER-3.6cp
Sulphated Ash ATSM-D874 %wt > 0.8 SCHAEFFER-0.8%
Phosphorus ASTM D5185 %wt ⥠0.05 and ⤠0.09 SCHAEFFER-744-843
Sulfur ASTM D5185 %wt ⤠0.3 SCHAEFFER-
Evaporation loss (NOACK) at 250°C CEC L-40-93 ⤠10% SCHAEFFER- 10%
Total Base Number ASTM D2896 mgKOH/g ⥠6.0 SCHAEFFER-7.8
According to Schaeffer Technical Data Sheet they meet all these requirements with the exception of SULFUR which is not listed. That may be the contributing factor.
Though sulfur ppm isn't listed , Schaeffer claims its 8008 Advanced European Performance mid saps 5W30 is a C3 oil.......
which meets or exceeds 229.x1 though no proper MB approvals.