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#586149 - 12/23/02 01:47 AM 96 VW Passat TDI AMSOIL 15W-40
Andy H Offline


Registered: 12/08/02
Posts: 143
Loc: San Antonio
Hi Everyone,

Here's the latest (ok, second!) installment in the 'are my rings grinding themselves off?' saga which started here.

'96 VW Passat TDI 97520 miles
AMSOIL 15W-40 Diesel/Marine, 5743 miles on oil
Stock engine, Oilguard bypass filter, OEM full-flow, Purolator air filter
Changed bypass filter @ 97322 miles
Changed to AMSOIL 2-stage air @ 95900
Primarily two 18 mile trips per day, 60-80 mph
Used 2 quarts of oil (1 from Oilguard change)
LAB: Oilmaster Oil Analysis Dec, 2002

Just realized that I didn't change the Oilguard when I moved from Rotella T to AMSOIL... [Duh!]

code:
        Rotella  AMSOIL
Aluminum 9 3
Chrome 28 11
Copper 13 0
Iron 55 20
Lead 5 0
Tin 5 0
Silicon 17 0
Potassium 10 2
Sodium 3 1
Water <.1 .4
Oxidation 14.0 15.5
[email protected] 14.0 14.2
Glycol 0 0
Fuel <2.0 <2.0
TBN 8.2 <3.0
SAE <5
Nitration <2.0
Soot 1.5 1.2

Ok..

Parts per mile (edit: hmmm..parts per million per mile?!)
Iron .0061 .0035
Chrome .0031 .0019

It looks like ring wear has dropped a bit. I've still got compression, so there must be some rings left. [Wink]

Anyone? Anyone? Bueller?

Andy

[ December 23, 2002, 08:13 PM: Message edited by: Andy H ]

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#586150 - 12/23/02 01:48 AM Re: 96 VW Passat TDI AMSOIL 15W-40
Andy H Offline


Registered: 12/08/02
Posts: 143
Loc: San Antonio
Oh, Yeah... The car gets new oil and filter for Christmas...

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#586151 - 12/23/02 02:08 AM Re: 96 VW Passat TDI AMSOIL 15W-40
Giles Offline


Registered: 12/02/02
Posts: 403
Loc: California
Looks like you found the oil to use! Nice to see before and after improvements like this.

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#586152 - 12/23/02 04:07 AM Re: 96 VW Passat TDI AMSOIL 15W-40
satterfi Offline


Registered: 06/20/02
Posts: 903
Loc: CA
The silicon number sure looks better. I wonder it has anything to do with the lower wear metals?

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#586153 - 12/23/02 04:17 AM Re: 96 VW Passat TDI AMSOIL 15W-40
Andy H Offline


Registered: 12/08/02
Posts: 143
Loc: San Antonio
Ok... To add insult to injury...

I took the two samples differently. The first was mid-stream from the oil drain within about 5 minutes of shutting the engine down. The second was with the engine running, and was collected from the intake hose of the bypass filter.

For what it's worth...
Andy

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#586154 - 12/23/02 04:39 AM Re: 96 VW Passat TDI AMSOIL 15W-40
Al Offline


Registered: 06/08/02
Posts: 17555
Loc: Elizabethtown, Pa
Yea better numbers. Maybe silicon as was partially responsible. But look at the TBN for Amsoil [Eek!]

[ December 23, 2002, 08:40 PM: Message edited by: Al ]

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#586155 - 12/23/02 05:26 AM Re: 96 VW Passat TDI AMSOIL 15W-40
satterfi Offline


Registered: 06/20/02
Posts: 903
Loc: CA
Andy H

running a controlled test isn't easy.

new air filter, changing collection procedure, potential lab error (TBN is your case)...

You need a lot more than $25 per test to get it right.

But in any event, your engine looks to be OK without any major problems on the horizon. So be happy.

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#586156 - 12/23/02 05:27 AM Re: 96 VW Passat TDI AMSOIL 15W-40
Andy H Offline


Registered: 12/08/02
Posts: 143
Loc: San Antonio
Al, Yeah, this oil's dead. I'll do a flush and switch to the Series 3000 5W-30 tomorrow. I *think* the problem is that I left about a quart of Rotella in when I failed to change the bypass filter with the change to the AMSOIL. This is the first run with AMSOIL in this engine.

I was surprised to see water in the oil, tho - especially with the Oilguard.

I also used two cans of LubroMoly diesel purge for the fuel system this oil period. I don't have any idea if that could have shortened the life of the oil.

Andy

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#586157 - 12/23/02 05:33 AM Re: 96 VW Passat TDI AMSOIL 15W-40
Andy H Offline


Registered: 12/08/02
Posts: 143
Loc: San Antonio
Hi Satterfi,

I didn't intend a controlled test, but now have two oil samples in a row and am learning each time. [Smile]

FWIW, these two tests were 'free' from Oilmaster - they came with the bypass filters.

I feel better about the engine, that's for sure. I really didn't want to tear into it for Christmas.

Speaking of which -- Merry Christmas All!

Andy

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