Here are the results from my 10k sample running Schaeffer's Supreme 15w-40. I have not changed the oil yet. No secondary filtration, only about a half qt make up oil between the 5,500 mile sample and the 10,000 mile sample. 5,500 mile sample was done through Schaeffer's, 10,000 mile sample was done through Predictive Maintenance Services. I know you probably shouldn't mix labs, but... So, do I change the filter and keep going, or change it all out and do another 10k run?? On edit, my truck has 40,000 miles on it.
Miles: 5500, 10000
Iron 17, 26
Chromium 0, 0
Lead 7, 7
Copper 6, 15
Tin N/A, 2
Aluminum 3, 3
Silicon 5, 17
Boron N/A, 1
Sodium N/A, 6
Potassium N/A, 7
Magnesium 12, 11
Calcium 5069, 3141
Phosphorus 1780, 1525
Zinc 1935, 1758
Molybdenum 152, 119
Fuel 0, 0
Water 0, 0
Glycol 0,0
Visc cst 14.75, 15.6
Soot 0, Oxidation 4, 4
Nitration 1, 2
TBN N/A, 10.2
[ November 18, 2005, 02:00 PM: Message edited by: 4x4man ]
Miles: 5500, 10000
Iron 17, 26
Chromium 0, 0
Lead 7, 7
Copper 6, 15
Tin N/A, 2
Aluminum 3, 3
Silicon 5, 17
Boron N/A, 1
Sodium N/A, 6
Potassium N/A, 7
Magnesium 12, 11
Calcium 5069, 3141
Phosphorus 1780, 1525
Zinc 1935, 1758
Molybdenum 152, 119
Fuel 0, 0
Water 0, 0
Glycol 0,0
Visc cst 14.75, 15.6
Soot 0, Oxidation 4, 4
Nitration 1, 2
TBN N/A, 10.2
[ November 18, 2005, 02:00 PM: Message edited by: 4x4man ]