2007 Audi A6 4.2 FSI, 9560 miles, Castrol 5w40

[audi_guy]

First UOA on this car. Blackstone noted the Potassium and Sodium. There has been no noticeable loss of coolant. Since this car spent its first 51K miles in Illinois, this might be a result of winter driving and the numbers could diminish over the next couple of OCI's. I'll keep an eye on it.

Pretty pleased with the results overall.

Lab: Blackstone
Months in service: 12
Miles on oil: 9,560
Miles on Unit: 61,219
Makeup oil: 1 qt
Oil: Audi/VW Castrol 5w40 PN: ZVW-352-540-S

Code:


unit Universal Avg @ 5000 mile

ALUMINUM 6 5

CHROMIUM 1 0

IRON 22 16

COPPER 4 11

LEAD 2 4

TIN 2 2

MOLYBDENUM 41 19

NICKEL 0 0

MANGANESE 2 2

SILVER 0 0

TITANIUM 0 0

POTASSIUM 5 3

BORON 44 45

SILICON 8 8

SODIUM 37 11

CALCIUM 2346 2129

MAGNESIUM 49 284

PHOSPHORUS 824 858

ZINC 914 1013

BARIUM 0

SUS Viscosity @ 210F 64.1

cSt Viscosity @ 100C 11.35

Flash point in F 395

Fuel %
Antifreeze % ?

Water % 0.0

Insolubles % 0.3

TBN 2.7

 

[dparm]

Looks good. I would get TBN & TAN next time.

 

[Quattro Pete]

I drive in IL snow and don't see silicon levels as high as yours. Possible air leak? You're not using some aftermarket air filter, are you?

 

[dparm]

Alusil block.

 

[audi_guy]

Originally Posted By: Quattro Pete
I drive in IL snow and don't see silicon levels as high as yours. Possible air leak? You're not using some aftermarket air filter, are you?


Nope. Factory intake filter box and Audi/VW filter.

Originally Posted By: dparm
Alusil block.


Yep.