Recent Topics
Bank 2 exhaust manifold on 1MZFE V6
by artbuc
Today at 01:51 AM
Thoughts on 2016 Acrua MDX 9 Speed Trans
by BISCUT
Today at 01:16 AM
Can I mix these? Same thing? (Castrol Edge STP/US)
by fernandoar
Today at 01:09 AM
Looking for YouTube channels
by Merkava_4
Today at 12:25 AM
Pennzoil confirms CaSa contributes to LSPI, maybe.
by wemay
Today at 12:20 AM
What's so special about the ACDelco PF65 ?
by Merkava_4
Today at 12:11 AM
Goodyear - what oil filters do they use?
by wemay
Yesterday at 11:45 PM
Late model AWD Astro/Safari thoughts?
by AZjeff
Yesterday at 11:36 PM
Ac delco pf63 and fram xg10575 different sizes
by moparguy19
Yesterday at 11:01 PM
what type of frog/toad is this?
by 04SE
Yesterday at 10:36 PM
Pennzoil Answers-Complete Protection and Oil Myths
by wwillson
Yesterday at 10:34 PM
Falken Pro G4 A/S
by Corollaman
Yesterday at 09:13 PM
Newest Members
MightMirage, fernandoar, WarrenZ, alexautoinc, fastcar22
55181 Registered Users
Who's Online
18 registered (chrisri, bbhero, dec219644, Char Baby, 4 invisible), 439 Guests and 134 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
55181 Members
66 Forums
236641 Topics
3812716 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: 15879
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: 15879
Loc: Iowegia - USA
[LOL!]

A bananna also has esters. [Big Grin]

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

Top