Recent Topics
Euro formula?
by otis24
07/31/15 10:25 AM
Best Radar Detector- Real World
by AirgunSavant
07/31/15 10:09 AM
When you talk to one helpful service advisor...
by mclasser
07/31/15 09:37 AM
PF48
by ChevyBadger
07/31/15 08:45 AM
Silkolene updates formula to "XP", jacks price up
by LoneRanger
07/31/15 08:27 AM
Oil heater
by Camprunner
07/31/15 08:06 AM
Total quartz 0w20 any opinions
by Joe1
07/31/15 06:54 AM
Oil changed at dealership and now have sand in it
by Turtleboy
07/31/15 04:46 AM
Small hole in y pipe
by madRiver
07/31/15 04:11 AM
Made it 30 days smoke free
by Marco620
07/31/15 02:08 AM
Anyone w/experience refinishing AT steel plates?
by Oro_O
07/31/15 01:58 AM
When it feels like too long......
by daves87rs
07/31/15 01:44 AM
Newest Members
FishyZ28, FiretoFlames, ryanm8, csammons, TOYJOETA
54895 Registered Users
Who's Online
83 registered (Alfred_B, 4wheeldog, Atlantis, AirgunSavant, 209paulc, a2gtinut, 7 invisible), 1669 Guests and 83 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
54895 Members
66 Forums
235160 Topics
3783271 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: 191
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: 15688
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: 15688
Loc: Iowegia - USA
[LOL!]

A bananna also has esters. [Big Grin]

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

Top