Oil Analysis - Page 2 - PeachParts Mercedes-Benz Forum

Brian Carlton · #16 02-01-2004, 10:57 AM

Quote:

Originally posted by JHZR2
A nice shot of calcium will do some, but the esters (especially polyol esters like found in redline oils) are more aggressive.

All the same, typically it is true that an oil analysis done the first time with a new oil will show remnants of slop that was cleaned and clashed additive packages which cause some funny readings.

JMH

Just to clarify: This is not the first run with Rotella. The 617 had one previous run to 8K on Rotella. I did not sample it at that time.

Additionally, the calcium, at 3029, was the highest number on the printout, thereby confirming the intentions of Shell in that regard.

The moly, at 9, clearly shows that Shell does not use it as an ant-wear additive in Rotella. Might be from the piston rings?

The 126 had 177,000 miles at the time of the test.

JHZR2 · #17 02-01-2004, 11:09 AM

OK, then Id have to say that unless there was a lot of sludge holding fe and other wear metals in, that your readings are probably pretty accurate. Fe of 62 doesnt seem unreasonable at your OCI.

Its nice to see that high Ca, Ive seen that spike in a bunch of rotella UOAs, and although the rotella additive package is not particularly spectacular, its nice to see that.

It is not rare for a very low concentration of moly to be present in oils. I have seen numerous virgin oil analyses that show 1-10 ppm of moly. Not significant compared to the typical 70+ppm in the m1 and pennzoil oils, but at least you can count on the moly very slowly palting onto surfaces, affording good protection.

Ive found that moly helps for economy slightly, and it is known to be a barrier additive, so it provides good protection at cold startups. However, it is well known that the chevron lubricants, both the delo and the regular gasser line of oils protect really well without even 1ppm of moly. Why? Because the lube design, the severe group II+ hydrocracking and a nice additive package does it all for you. From an oil analysis perspective, its offering great protection, but I found it reduced my mpg some compared to moly additives.

If you want moly, Id definitely reccomend adding just a tiny bit of schaeffer's #132 additive. Has a proprietary moly folrmulation that plates up real well, and also has some antimony, which is a powerful anti-corrosive.

JMH

#18 02-02-2004, 10:48 AM

[quote]posted by TomJ
The schaeffers "additive" is just pure B100, no more and no less.

This is not accurate. Soyshield is highly concentrated.
http://www.schaefferoil.com/msds/139.html
http://www.schaefferoil.com/data/139.html