Recent Topics
Considering a new Lexus ES - Durability?
by David_Corbett
05/04/16 04:02 PM
2016 Audi S4 Factory Fill UOA at 3,793 Miles
by CrazyJeeper
05/04/16 03:25 PM
epoxy to secure asphalt shingle?
by Digital2k2
05/04/16 03:21 PM
$75 Seized engine
by demarpaint
05/04/16 03:19 PM
Question on a VIN number..
by dblshock
05/04/16 03:18 PM
Hydrogen Fuel Cell Vehicles
by HTSS_TR
05/04/16 03:18 PM
Wiper insert spring steel
by SHOZ
05/04/16 01:52 PM
BMW X1 / N20 2.0L Turbo - what oil ?
by Ndx
05/04/16 12:02 PM
1999 RANGER 3.0 SYNTHETIC OIL SUGGESTIONS
by AUTOTECH89
05/04/16 10:56 AM
Oil spec questions
by IllinoisSparky
05/04/16 10:43 AM
Amazing Rendition of the U.S. National Anthem
by MolaKule
05/04/16 10:37 AM
So many detailing products........
by buster
05/04/16 10:00 AM
Newest Members
NatedeScate, Bogie69, Cali, Fyko, Palmer
57794 Registered Users
Who's Online
95 registered (aquariuscsm, 06AllAmerican, Al, Astro14, 69GTX, 10 invisible), 1 Guest and 0 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
57794 Members
66 Forums
248463 Topics
4063336 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#586492 - 07/25/03 07:05 AM Any opinions??
Mike Piles Offline


Registered: 07/24/03
Posts: 1
Loc: Arnold, MO
Done by OilGuard
Oil: Caterpillar 5W40 SDEO
Miles on oil 10166
Miles on Car 91766

Aluminum 4
Chromium 4
Copper 8
Iron 23
Lead 0
Tin 1
Silicon 9
Potassium 0
Sodium 0
Water <0.1
Oxidation 64.4
[email protected] 17.0
Glycol None Detected
TBN 3.4
Soot 0.8

Notation.

All engine wear rated appear normal. High degree of oxidation Indicated. Suspect high operating temperature and/or over extended drain interval.

Any opinions would be appreciated.

Thanks
Mike Piles

--------------------
Mike
00 Green VW Jetta 5 speed TDI

Top
#586493 - 07/25/03 09:18 AM Re: Any opinions??
TooSlick Offline


Registered: 08/02/02
Posts: 5785
Loc: Dixie
Mike,

I think you need to thoroughly clean your EGR valve. I believe what is happening here is the valve is stuck open with oil/soot deposits. This is allowing lots of exhaust loaded with oxides of sulphur and nitrogen into the combustion chamber and generating very high levels of nitration/oxidation. Both these processes result in the formation of organic acids, which is depleting the TBN. In addition, oxidation essentially increases the molecular weight of the oil and is causing the thickening you see.

The wear rates look pretty good, but running with very high rates of oxidation will result in the gradual formation of sludge/varnish/carbon deposits. So this isn't something you want to let continue. It is very uncommon to see Delvac 1 degrade like this in the TDI ...!

TooSlick

Top