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Old 02-16-2005, 08:15 PM   #1
Techno Sapien
Member#: 449
Join Date: Oct 1999
Chapter/Region: MWSOC
Location: Lawrence, KS
2016 BRZ Limited
Ice Silver Metallic

Forester F-XT 30K Blackstone oil analysis

Had my oil tested posted the results here for anyone interested:


Anyone else have this done? I'd be interested in comparing notes.

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Old 02-17-2005, 12:11 PM   #2
Scooby Newbie
Member#: 20254
Join Date: Jun 2002
Chapter/Region: Tri-State
2010 VW GTI
2013 Outback 3.6R



Good information! Sounds like your car has a clean bill of health. I hope you take as good care of your own oil (blood) as you do your subies!

BTW, Where did you buy your Green filter? Part number?

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Old 02-17-2005, 01:47 PM   #3
Scooby Specialist
Member#: 11015
Join Date: Oct 2001
Chapter/Region: MAIC
Location: Northern VA
'06 Volvo V70R
Sonic Blue


I'll be sending my Baja Turbo sample to them very soon. Several our members on Swedespeed.com have used Blackstone to test their V70R and S60R cars.

Good information and analysis.
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Old 02-17-2005, 02:23 PM   #4
Techno Sapien
Member#: 449
Join Date: Oct 1999
Chapter/Region: MWSOC
Location: Lawrence, KS
2016 BRZ Limited
Ice Silver Metallic


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Old 02-17-2005, 02:29 PM   #5
Scooby Guru
Member#: 767
Join Date: Jan 2000
Chapter/Region: Tri-State
Location: N.J.
04 FXT


This is the third time I've seen this today.

FWIW, here is mine from last summer:
Equipment make: Subaru
Equipment model: 2.5L Turbo
Oil use interval: 5,774 miles
Oil type & Grade: Mobil 1 5W30 SS
Make-up oil added: 0
Miles on unit: 13,524
Air filter: Amsoil
Oil filter: OEM

Aluminum 6
Chromium 1
Iron 15
Copper 20
Lead 2
Tin 0
Molybdenum 63
Nickel 0
Maganese 0
Silver 0
Titanium 0
Potassium 3
Boron 115
Silicon 18
Sodium 6
Calcium 3394
Magnesium 10
Phosphorous 764
Zinc 904
Barium 1

SUS Viscosity @ 210F: 57.8 (Should be 55-62)

Flashpoint: 395F (>365)
Fuel %: .5 (<2.0)
Antifreeze: 0 (0)
Water: 0 (<0.1)
Insolubules: .3 (<.6)

Dennis: Ö Iron and copper read somewhat high in this sample, and they are probably from the wear-in process. Silicon was mildly high too, and itís from sealers and sand-casted parts. All these findings should improve in the next sample. The TBN read 4.4, but we would not extend the oil change interval until wear comes down. Ö
Your viscosity was similar to mine and I ran it for 5,700 miles. That included a trip to SC in the summer. Blackstone said the high silicon was because of break-in, but I have a feeling it's also the Amsoil filter. Silicon was high on my WRX with this filter as well. Folks on BITOG have been saying that M1 flashpoints have been getting lower. Reformulation I believe. Hopefully your oil temp will stay below 370F.


Last edited by bluesubie; 02-17-2005 at 02:45 PM.
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Old 02-17-2005, 05:33 PM   #6
Scooby Newbie
Member#: 33566
Join Date: Mar 2003
Chapter/Region: International
Location: Aberdeen, Scotland

Originally Posted by Blackstone Oil Analysis
MARSHALL: We can see you are bumping up your oil use miles ever so slowly, and the engine isn't even noticing the change. Iron is the one metal that will tend to track with miles oil use in most types of engines, and that is probably why you get a 2 ppm increase in this metal. It is only to average at this point and not a concern. You are 500 miles longer at this point than the average owner of this type
engine is using. Wear is perfect. You could easily go to 4,500 miles next sample if you wanted. Minor traces of gas found. Otherwise, very nice!
I've been sending in almost every change so far in my FXT's life. I have about 13k on the clock now. I switched to Mobil 1 5w-30 @ 1k and stayed with it ever since. I've only used OEM filters, though I'm thinking about going to an easier to source well constructed brand. NAPA Gold seem to be well constructed and easy to get, though I need to do more research on this. FWIW I live in Moab, UT and there are large differences in summer/winter temps and it can get really, really hot here during the summer.

If anybody wants my history so far I can forward my PDF report on to them. It might be useful, or it might not be.

NOTE: I have no idea why gas turned up in this last sample. It hasn't been there before. My engine mods include: COBB STG 1 since 5k w/ catback, K&N filter, snorkus delete, dual catch can setup and silicone Y pipe.

Last edited by SubaruCO; 02-17-2005 at 06:03 PM.
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