Schaeffer 204SAT

[Colt45ws]

Code:




Silicon 1

Sodium 1

Potassium 2

Molybdenum 6

Boron 199

Magnesium 1

Calcium 247

Phosphorous 533

Zinc 16

Water
Visc 7.4cSt@100C

TAN 1.59

I tested a open bottle with a 07/09 date. Because that was what I put in it rather than the 03/11 stuff I have in sealed containers..
Something funky is going on because the TAN here is higher than my UOA...?

 

[Jim Allen]

Lab error. Still it's low. You might contact Schaeffer and ask them for a "typical" tan to give you some idea what's "normal."

 

[Colt45ws]

What is the error range on TAN?

 

[Jim Allen]

I suppose it might depend on the lab. Seems like I've seen an industry standard number somewhere, tho. My brain is too full of other stuff to recall it.

 

[Colt45ws]

Im fairly certain there is a standard for repeatability in the ASTM, but I dont know the standard number and ASTM want $40 to view a standard.

 

[Jim Allen]

Like I said, if you can get Schaeffers to cough up a normal TAN number for comparison, you can relieve your mind over this without spending any money. Either number is low, so you aren't risking much continuing with the oil.

 

[Colt45ws]

Yeah, I know its low in my UOA, I was just hopeful to get a good starting TAN to know where I can go with it.