Recent Topics
Why the auto repair industry gets a bad rep
by jeepman3071
2 minutes 25 seconds ago
Isobutanol - the next gen biofuel
by beechcraftted
8 minutes 54 seconds ago
Legend Performance 2 stroke oils?
by PaleRider
9 minutes 17 seconds ago
Amsoil ATF and Magnefine
by paulgoh
45 minutes 31 seconds ago
oscaro.com free shipping 8/29 to 9/4
by NormanBuntz
Today at 09:44 AM
European delivery program - anyone use it?
by tomcat27
Today at 08:53 AM
A/S tire suggestions for Subaru Legacy
by Picky1
Today at 08:30 AM
Where the autos are located.
by CourierDriver
Today at 08:14 AM
Lead Carbon Batteries
by Shannow
Today at 07:12 AM
Buzzing rumble after new pads rotors.
by JustinH
Today at 06:54 AM
Kia Sorento 2.5 CRDi.
by Silk
Today at 05:55 AM
Mann - Corolla - Paper and foam !!! (see photo)
by NGRhodes
Today at 04:59 AM
Newest Members
kbaba7, hpb, johnny69, Katy, docsavage
51129 Registered Users
Who's Online
90 registered (86cutlass307, 123Saab, aquariuscsm, 3800Series, abycat, 9 invisible), 1712 Guests and 273 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51129 Members
64 Forums
218461 Topics
3444800 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: 14383
Loc: Midwest
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: 14383
Loc: Midwest
[LOL!]

A bananna also has esters. [Big Grin]

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

Top