Reply to "Synlube"

quote:

Originally posted by Taterandnoodles:

quote:

Originally posted by Miro Kefurt:
Taterandnoodles

Anything looked or smelled like "used" oil to you ?

Trajan =Date Registered: Sun March 14 2010
Nucleardawg=Date Registered: Sat March 13 2010
snakedoctor=Date Registered: Fri April 02 2010

(same person really)

Want to know but fear to ask, but can not expain the difference between the LAB results...

(like Viscosity or TBN)

No it does not appear to be used oil. The odor of synlube is indeed like no other oil I have encountered new or used.

As for the TBN bruce uses ASTM 2896 for determining TBN Polaris uses ASTM D4739 there is your variance right there.

As for the fuel I'm not sure where that came from any more then Miro is I am sure. Molakule thinks it might be aromatics and not actual fuel. Miro would know if the formula uses any percentage of aromatics.

To truely evaluate the oil in service besides the spectro and TBN we would need TAN, ferrography and particle count. Low wear metals (ppm) in the spectro can miss larger wear particles. Units have failed even with stellar PPM in the spectro. The reverse would also be true.

Assuming the 100ppm synlube should have native then Budmans numbers would be 66ppm over 19k miles. There is a UOA just posted last night by buster with 34ppm FE at 10500 miles.

It takes several UOA's from the same lab on the same unit to establish a valid trend.