“NEW” 15W40 Shell Rotella T Diesel Oil API CJ-4, CI-4 Plus, CH-4, CF-4, CF/SM, conventional (lab tested 2012)
Silicon = 3 ppm (anti-foaming agent in new oil, but in used oil, certain gasket materials and dirt can also add to this number)
Boron = 29 ppm (detergent/dispersant, anti-deposit...