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#2737810 - 09/08/12 01:12 AM Passat 1.8T G-Oil UOA history
zanzabar Offline


Registered: 06/21/09
Posts: 417
Loc: NorCal
Fourth UOA on G-Oil from my 2002 Passat 1.8T. Driving is mostly short trips with occasional 15-50 mile weekly jaunts. All four samples were taken from drain plug on the sump and less than 1qt was drained in total each time, sump capacity is 4qts so that amounts to 25% replacement each sample. See the end for adjusted quantities of wear metals that take this into account. Topup oil was <1qt G-Oil following each of the first three samples, plus ~1/3qt RotellaT 15-40 after the third one - no doubt many of you will note the effect on additives, TBN, and visc!

Code:
miles	  5500	3500	1500	50
ALUMINUM  4	4	2	1
CHROMIUM  0	0	0	0
IRON	  8	4	3	1
COPPER	  7	5	4	2
LEAD	  0	0	0	0
TIN	  0	0	0	0
MOLY	  58	63	62	61
NICKEL	  0	1	1	0
SILVER	  0	0	0	0
TITANIU	  0	0	0	0
POTASSI	  4	8	0	0
BORON	  78	118	126	155
SILICON	  64	54	29	10
SODIUM	  3	0	0	0
CALCIUM	  1910	1740	1823	1729
MAGNESI	  87	122	158	116
PHOSPHO	  771	716	718	644
ZINC	  824	709	741	759
BARIUM 	  0	0	0	0
				
V210F	 unkown	unkown	55.3	57.8
V100C	  9.5	8.6	8.86	9.6
Flash	 unkown	unkown	360	415
Fuel%	 <0.5	<0.5	TR	<0.5
Antifrz	 0	0	0	0
Water %	 unkown	unkown	0	0
Insol	 0.1	<0.1	0.3	0.2
TBN	 2.9	2.1	5.6	



If you adjust the wear metals to account for 25% reduction every sample you get Aluminum/Iron/Copper of 5/9/8.
_________________________
2014 Ford Focus (4k miles)
2009 Honda Fit (105k miles)
2001 VW Passat 1.8T (died@180k)
many VW TDIs (200+k miles)
2004 Mercedes C320 (230k miles)

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#2737815 - 09/08/12 01:22 AM Re: Passat 1.8T G-Oil UOA history [Re: zanzabar]
zanzabar Offline


Registered: 06/21/09
Posts: 417
Loc: NorCal
First two samples analyzed by Blackstone, the second two by whoever does the Wix analyses (in Portland).

Not entirely sure what's up with the silicon, but I think it's most likely from new valve cover gasket and replacing a large portion of the PCV hoses with silicone.
_________________________
2014 Ford Focus (4k miles)
2009 Honda Fit (105k miles)
2001 VW Passat 1.8T (died@180k)
many VW TDIs (200+k miles)
2004 Mercedes C320 (230k miles)

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#2738167 - 09/08/12 04:03 PM Re: Passat 1.8T G-Oil UOA history [Re: zanzabar]
71Chevyguy Offline


Registered: 07/10/11
Posts: 381
Loc: Martinsburg West Virginia
Looks like it did pretty well in a car that is known to be pretty hard on oil. I am doing an 8k run on G-oil in my Saturn Ion and may do a UOA for those of us here that are keeping an eye on the G-oil results. Looks like a decent oil, and FAR it can't be beat for short intervals if you do not believe it can handle more of a run. Looks like it did well in the Passat though.
_________________________
99 Beetle TDI 106k RT6 / Mahle filter
99 Beetle TDI 219k RT6 / Mann
87 Caprice 305
71 Nova 250

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#2739053 - 09/09/12 06:09 PM Re: Passat 1.8T G-Oil UOA history [Re: zanzabar]
tstep Offline


Registered: 08/06/11
Posts: 356
Loc: PA
It doesn't seem as though the high silicon has had an adverse affect on the wear numbers. Are you running an oversized filter? I insalled a Purolator L40316 (it is a rebadged Mann 950/4) and that added about 5/8-3/4 quart of capacity. Appreciate the G-Oil UOA.

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#2739262 - 09/09/12 11:45 PM Re: Passat 1.8T G-Oil UOA history [Re: tstep]
zanzabar Offline


Registered: 06/21/09
Posts: 417
Loc: NorCal
Originally Posted By: tstep
Are you running an oversized filter?


Nope, just a normal sized Mann W719/25.
_________________________
2014 Ford Focus (4k miles)
2009 Honda Fit (105k miles)
2001 VW Passat 1.8T (died@180k)
many VW TDIs (200+k miles)
2004 Mercedes C320 (230k miles)

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