Posting for SyntheticShield:
Engine: 3.8L Supercharged
Oil Filter: SDF29
Air Filter: Open Cone (Amsoil TS-191)
Miles On Car: 74900 (At Sample Time)
Make up oil: 0
Oil Install Date: 08.17.2005
Oil Sample Date: 10.30.2005
Lab: Oil Analyzers
Iron - 11
Chromium - 0
Lead - 4
Copper - 50
Tin - 0
Aluminum - 9
Nickel - 0
Silver - 0
Silcon - 53
Boron - 75
Sodium - 115
Magnesium - 38
Calcium - 3279
Barium - 8
Phosphorus - 747
Zinc - 797
Molybdenum - 44
Titanium - 0
Vanadium - 0
Potasium - 0
Fuel - <1
Viscosity 100c - 10.71 cSt
Water - 0
Soots/Solids - NA
Glycol - Negative
TBN - 6.28
Oxidation - 9.0
Nitration - 11.0
This is definitely the new, SM/GF-4 Amsoil 10w-30 that is formulated at 10.6cst...I'm VERY impressed by the perfect viscosity of this sample, no thickening at all. 
I think the Sodium is possibly from Amsoil incorporating the usage of Sodium Sulphonate as a new type of detergent in their oils as a replacement for the ZDP adds...the ZDP levels aren't quite SM/GF-4 legal, but could possibly be from the usage of the previous Valvoline 10w-30 for Auto-RX Clean/Rinse phases. Notice how there is also Molybdenum Disulfide in this sample...Amsoil is now using small amounts of this as a friction modifier obviously, as the previous Valvoline 10w-30 formulations contain 0 Mo, if it was indeed the All-Climate formulation.
The Silicon and Aluminum have me slightly stumped. The slightly high Al may be from the previous Auto-RX rinse phase, soft wear metals that were being cleaned off...the dirt could've been from some type of contamination or from Auto-RX still cleaning. I don't see any serious intake leak here, as the oil is still in physically good condition and the oxidation/nitration are excellent, TBN is normal.
Mike
Last edited on Fri Dec 2nd, 2005 04:21 am by AZMike
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