Recent Topics
Another one gone
by Inspecktor
18 minutes 11 seconds ago
2015 Impala vs...
by oilpsi2high
Today at 01:04 PM
Magnatec Spotted at AAP
by BTLew81
Today at 01:00 PM
Automatic Car Wash/DIY
by lawman1909
Today at 12:17 PM
Coolant refill
by supton
Today at 12:12 PM
Music is horrible today...
by MalfunctionProne
Today at 12:07 PM
180k mile Clean engine pictures
by donnyj08
Today at 11:45 AM
Autel MaxiDAS® DS708
by Michael_P
Today at 11:37 AM
Gulf War Story
by redbone3
Today at 10:41 AM
Oils that dont burn in a healthy 5.4L Triton?
by 2012AccentSE
Today at 10:41 AM
Purolator 14477 For toyota spin on
by kazual881
Today at 10:16 AM
Wow...what a shame.
by andrewg
Today at 10:16 AM
Newest Members
Kaiser_Sosse, jnormando, consolidated, mike_a, dlayman
52261 Registered Users
Who's Online
128 registered (aa1986, aquariuscsm, Alltherage, -SyN-, 15 invisible), 1632 Guests and 226 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
52261 Members
66 Forums
223797 Topics
3549687 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#586494 - 08/01/03 05:21 AM MB 300D potassium in oil analysis?
brian Offline


Registered: 01/28/03
Posts: 188
Loc: Colorado
Here are the oil analysis from a 1987 300D 6 cyl 3.0L IDI diesel engine. The engine sat for 2 years before I installed it in my car. It has 186,000 miles.

The first numbers are the most recent analysis, with 6200 miles on the oil - Mobil 1 SuperSyn 15w-50. The engine burns about 1 quart every 5,000 miles.

The second set of numbers in was the first oil I put in the engine, with about 2800 miles it was a combination of leftover synthetic oils, mostly Mobil 1 Tri-Syn 15w-50.

Iron 26 49
Chromium 1 2
Lead 2 9
Copper 2 10
Al 5 7
Nickel 0 4
Silver 0 0
Silicon 6 11
Boron 112 36
Sodium 7 39
Magnesium 125 403
Calcium 2882 3045
Barium 0 0
Phosphorus 1076 1038
Zinc 1222 1244
Moly 67 77
Potassium 28 29
Fuel less than 1% less than 1%
Visc 16.82 13.63
Soot 1.2 0.3
Glycol NEG NEG
TBN 11.24 9.89
Oxid 4 6
Nitr 2 2
F-Soot 1.23 0.38

I am curious where this Potassium may be coming from? Could it be leftover in the oil pan that hasn't managed to drain out yet? Is it just coincidential that its 28-29 ppm both times even though the drain interval is slightly more than 2X the first interval?

-brian

Top
#586495 - 08/02/03 09:01 AM Re: MB 300D potassium in oil analysis?
MolaKule Offline


Registered: 06/05/02
Posts: 14787
Loc: Iowegia
Since you have negative glycol, and a good dose of boron, I'd say the potassium is from the new Potassium Tri-Borate additive.

Top
#586496 - 08/02/03 06:07 PM Re: MB 300D potassium in oil analysis?
mrchecker Offline


Registered: 05/13/03
Posts: 179
Loc: Newtown Square, PA
Or you dropped a bannana in there. [Big Grin]

Top
#586497 - 08/03/03 03:05 AM Re: MB 300D potassium in oil analysis?
MolaKule Offline


Registered: 06/05/02
Posts: 14787
Loc: Iowegia
[LOL!]

A bananna also has esters. [Big Grin]

Hmmm, maybe a new, great smelling motor oil is in the works!?!?!?

Top