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Mobil 1 baseline data 15-50

I just had a sample of clean, unused Mobil 1 analyzed be Cleveland 
Technical Center.  I have been experimenting with synthetics in a 633CSI 
with about 120,000 miles. The unused sample results were as follows:

Wear metal sources all "0".  (iron, chromium, lead, copper, tin,  
 aluminum, nickel, silver, manganese)

Additives:
silicon 5  (also indicates level of airbourne dirt and abrasives)
Boron 196 (Mobil 1 uses quite a bit while Syntec and Amsoil do not)
sodium 0
magnesium 596
calcium 2473
barium 0
phosphorus 1199
zinc 1365
molybdenum 200
potassium 0 (usually in anti-freeze)
titanium and vanadium 0 (trace elements/wear indicatiors)
vis. @ 100 deg. C. cST 18.38 (50 wt. from 16.3 to 21.89)
TBN 10.9
TAN 2.24

At 4000-4500 miles oil usually shows viscosity of about 17.00, TBN about 
4.77, TAN about 4.43, silicon about 8 using BMW air and oil filters, 
solida about .1 (% of vol.)

I hope someone finds this useful.  I have not used lighter weights of 
synthetics.  
Bob Sneed
1983 633CSI
1991 525I
1981 R100 RS
1965 356 C