Here's the latest oil report on my sister's 93 Dodge Cummins 6bt. No oil changes were carried out and running a MotorGuard M100 and Puradyn MTS 24 bypass filtration system. Since the last report I changed 3 Motor Guard filters, requiring 3 litres of oil and 1 litre due to rear main seal leak. Still not sure what caused the spike in aluminum, but that number is coming down slowly, so very happy with the results.