Ok, here are the stats and such for my second oil analysis, along with the first analysis for comparison. The car - 2003 Jetta TDI Automatic. 1/2qt make-up oil added during both intervals. VW OEM air/fuel/oil filters for first interval, Mann air/fuel/oil filters installed for second interval. 6oz of PowerService every fill up for first interval, 1oz of Primrose Powermaster 405 added every fill up for second interval.
Analysis by OAI
Oil: Mobil Delvac1 5w40
Oil Filter: OEM VW - Mann
Miles on sample: 9718 - 10322
Miles on engine: 19634 - 29956
Oil change date: 4/18/04 - 10/31/04
Na went from 1 to 5, any reason why?? I'm thinking it's still ok though.
The oil thickened up a bit though, and I'm not sure why. If anything, this interval was much easier on the oil than the previous one (not as many short trips, warmer weather, etc). Could the Primrose fuel additive have anything to do with this??
Overall, I'm happy with these numbers, and the wear metals seem to be heading in the right direction. Help me read between the lines here
Analysis by OAI
Oil: Mobil Delvac1 5w40
Oil Filter: OEM VW - Mann
Miles on sample: 9718 - 10322
Miles on engine: 19634 - 29956
Oil change date: 4/18/04 - 10/31/04
Si went from 2 to 5, still ok. I'm thinking this is because of the air filter change (introducing contamination when opening filter box?)code:
Iron - 50 - 43
Chromium - 11 - 7
Lead - 2 - 1
Copper - 11 - 6
Tin - 0 - 0
Aluminum - 12 - 10
Nickel - 6 - 0
Silver - 0 - 0
Silicon - 2 - 5
Boron - 20 - 17
Sodium - 1 - 5
Magnesium - 468 - 513
Calcium - 2284 - 2665
Barium - 0 - 0
Phosphorus - 1050 - 1146
Zinc - 1391 - 1311
Molybdenum - 1 - 0
Titanium - 0 - 0
Vanadium - 0 - 0
Potassium - 0 - 0
Fuel %Vol - less than 1 - less than 1
Vis @ 40 C - NA - NA
Vis @ 100 C - 14.20cSt - 16.10cSt :shrug:
Water %Vol - 0 - 0
Soot\Solids %WT - 0.8 - 0.7
Glycol - NEG - NEG
TBN - 4.91 - 6.74
OXID - 22.0 - 23.0
NITR - 18.0 - 18.0
F-SOOT - 0.84 - 0.76
Change - YES - YES
Na went from 1 to 5, any reason why?? I'm thinking it's still ok though.
The oil thickened up a bit though, and I'm not sure why. If anything, this interval was much easier on the oil than the previous one (not as many short trips, warmer weather, etc). Could the Primrose fuel additive have anything to do with this??
Overall, I'm happy with these numbers, and the wear metals seem to be heading in the right direction. Help me read between the lines here