Quote:
Originally posted by Rafi
mayarmar & Ymsin posted results of used oil analysis. The metals analyzed are possible wear metals but what about the additive metals depletion as they are used up? I did not see a reading for zinc, calcium, or magnesium. The very low reading of phsphorous does not make sense to me unless they stopped using that additive. Another important element for additive/wear/condition is sulfur but there was no reading for it. Also there was no mention of viscosity or viscosity index.
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Rafi, good point. I got lazy typing, but here is full analysis report for 99 ML430:
Mileage 87k........................70k
Mobil1 15W50.................Mobil1 10W30
After 6k miles................ After 15k miles
Aluminum 5...........................7
Chromium 1..........................1
Iron 12 ...........................16
Copper 4...............................7
Lead 0...................................4
Tin 1 ....................................1
Molibden 0.............................0
Nickel 2..................................0
Manganese 3 ......................72*
Silver 0 ..................................0
Titanium 0............................. 0
Potassium 9...........................0
Boron 58..............................31
Silicon 23...............................9
Sodium 5................................4
Calcium 800.......................848
Magnesium 1372...............1352
Phosphorus 897.................655
Zinc 1082............................757
Barium 0................................0
Viscosity 80.3......................59.9
Flashpoint 380....................360
Fuel% <0.5........................<0.5
Antifreeze 0%..................... 0%
Water 0%.......................0%
Insolubles 0.4%...................0.3%
* High Manganese content was due to a lot of Canadian gas used
Regards, Mike