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#4245424 - 11/09/16 12:03 PM Mobil 1 5W-40 5-10000 miles Volkswagen Beetle TDI
veryHeavy Offline


Registered: 11/04/16
Posts: 215
Loc: MN, CA
This car was maintained by a previous owner. I think it was 5000 miles, but it may have been 10,000 per the manual. He didn't tell me. The engine had faulty glow plugs, which were replaced by VW about 2000 miles before the oil sample.
Code:
11 aluminum
3 chromium
91 iron
9 copper
5 lead 
0 tin
20 moly
3   nickel
1   manganese
0   silver
0   titanium

Code:
4  potassium
37 boron
7  silicon
6  sodium
1339 calcium
773  magnesium
994  phosphorus
1219  zinc
0    barium
3.7  TBN
7.9  TAN
81.0 SUS viscosity at 210F
15.8 cSt viscosity at 100C


TECHNICIAN: "Iron and copper are high compared to universal averages, which show typical wear after about
7,100 miles on the oil. Iron is from steel and copper comes from brass/bronze. Other metals are fine and no
contamination was present that might account for the wear. The viscosity was a bit thick, but that's probably
not the reason for the excess metals either. If engine work has been done recently, it could explain the iron
and copper. The TBN shows plenty of additive remaining, while the TAN of 7.9 shows some acidity. Check
back and we'll see how wear metals trend."

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#4245431 - 11/09/16 12:06 PM Re: Mobil 1 5W-40 5-10000 miles Volkswagen Beetle TDI [Re: veryHeavy]
Quattro Pete Offline


Registered: 10/30/02
Posts: 32709
Loc: Great Lakes
That's some high TAN right there.

How long was the oil in service, in terms of time, not miles?
_________________________
'02 530i (Edge HM 10W-40)
'15 Q5 3.0T (Edge 5W-40)

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#4245434 - 11/09/16 12:10 PM Re: Mobil 1 5W-40 5-10000 miles Volkswagen Beetle TDI [Re: veryHeavy]
Popsy Offline


Registered: 05/10/15
Posts: 696
Loc: Frogland / Brittany
TAN is elevated, oil thickened a bit...maybe much soot contamination? Is is M1 5W40 turbo diesel?

I'll reduce OCI and monitor, also check the camshaft.
_________________________
96 Barchetta, Motul 8100 5W40 | 98 Fiat Marea TD, Total 10W50
05 Forfour 95, Petronas 0W40 (gf's car) | 10 Colt Ralliart, SHU 0W40

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#4245885 - 11/10/16 07:20 AM Re: Mobil 1 5W-40 5-10000 miles Volkswagen Beetle TDI [Re: veryHeavy]
4WD Offline


Registered: 09/21/10
Posts: 1973
Loc: Texas/International
May have been 10k
_________________________
2015 Explorer Sport 3.5L EB AWD
2014 Fusion Hybrid Titanium
2013 Cruze LTZ RS 1.4T
2010 Canyon 3LT 4WD V8

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#4267413 - 12/05/16 11:29 PM Re: Mobil 1 5W-40 5-10000 miles Volkswagen Beetle TDI [Re: veryHeavy]
FowVay Offline


Registered: 06/02/02
Posts: 2461
Loc: Southeastern USA
Which TDI engine is this? What is the vehicle model year?

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#4269218 - 12/08/16 01:43 AM Re: Mobil 1 5W-40 5-10000 miles Volkswagen Beetle TDI [Re: veryHeavy]
edyvw Offline


Registered: 03/08/12
Posts: 3711
Loc: Colorado Springs
Iron is not an issue, it is VW after all.
But TAN? Holy moly!
_________________________
13' BMW X5 35d (Mobil1 5W30 ESP+OEM filter)
11' VW Tiguan 2.0T (Castrol 0W40+OEM filter)

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