Recent Topics
VW and Shell accused of trying to block EV push
by wemay
05/01/16 08:30 AM
(previously repaired) cracked 351 block. trash?
by tomcat27
05/01/16 08:12 AM
CarQuest #84045, 600 miles CUT OPEN
by car51
05/01/16 08:10 AM
Molybdenum, is there a downside?
by 5170
05/01/16 07:52 AM
Cleaning 'Foggy' Headlights
by coopns
05/01/16 07:45 AM
tow a 1984 F150 4wd manual on a dolly?
by tomcat27
05/01/16 07:10 AM
Looking for info on two quick spray waxes.........
by demarpaint
05/01/16 04:43 AM
The Heroin Epidemic In The U.S....
by qwerty1234
05/01/16 01:28 AM
Air filter wrap
by Duffyjr
04/30/16 10:21 PM
15W-40 Delo, Delvac or Rotella For KUBOTA turbo
by pburchett
04/30/16 09:50 PM
Traveler synthetic oil a slow seller?
by Electromotive
04/30/16 09:34 PM
Tyre rubber, methanol, and bore wear
by Shannow
04/30/16 09:34 PM
Newest Members
Doxxy, Jetstreamz06, TalNum, Spinnizle, JustinL
57758 Registered Users
Who's Online
71 registered (2015_PSD, Bandito440, AirgunSavant, Astro_Guy, Astro14, andyd, 7 invisible), 1348 Guests and 331 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
57758 Members
66 Forums
248288 Topics
4059967 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: 195
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: 16938
Loc: Iowegia - USA
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: 16938
Loc: Iowegia - USA
[LOL!]

A bananna also has esters. [Big Grin]

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

Top