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Old 03-31-2007, 03:52 AM   #1
FD777
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Member#: 84820
Join Date: Apr 2005
Chapter/Region: BAIC
Location: Santa Clara/Sunnyvale, CA
Vehicle:
2005 WRX Sedan
Crystal Gray

Default Oil Analysis - Castrol Syntec GC 0w-30 - 4100mi - 2005 Subaru WRX

Driving details:
I drive the car moderately. I ALWAYS let her warm-up. ~3k RPM shifts when the she's cold and ~4k RPM shifts when she's warm.
Car averages two 7-mile city trips on weekdays and random highway trips through the month.

I tracked the car twice with five 20 minute sessions. (2 x 5 x 20 = 200 minutes)
I also went for a few spirited drives...

This oil went through the tough (sarcasm) Bay Area winter. Temeperatures were mostly in the 40s F to 70s F.

Personal Comments:
As Blackstone mentioned, the probable cause for the high copper is from the track. The copper coupled with 1.5 qts of make-up oil tells me to use a thicker oil.
The previous sample of Mobil 1 10w-30 looked fantastic and I believe that GC would be on par if not for the much harder driving.
I still have GC in the car, but I'm looking into other oils now. (Delvac 1 comes to mind.)

Current UOA:
Code:
OIL FILTER: Subaru OEM Tokyo Roki - 15208AA100
AIR FILTER: Subaru OEM - 16546 AA020

EQUIPMENT MAKE: Subaru			OIL USE INTERVAL: 4,100 Miles
EQUIPMENT MODEL: 2.0L Turbo		OIL TYPE & GRADE: Castrol Syntec GREEN 0W/30 (Gas)
FUEL TYPE: Gasoline (Unleaded)		MAKE-UP OIL ADDED: 1.5 qts
 
Copper increased in this sample. Generally this wear metal comes from a brass/bronze 
part, such as a bushing but in your case it may be from your turbo. We suggest this because of the 
track days you mentioned. We have a feeling that you could probably hear your turbo whining all the 
way around the track. I like the way mine sounds and I'm sure you do too. Check back in another 4K 
miles to monitor. We think with no track days on the oil your copper should improve. No harmful 
contaminants were found. The TBN read 6.3, which shows lots of active additive left.
 
 
ELEMENTS IN PARTS PER MILLION (PPM)
 
MI/HR ON OIL		4,100		4,000		Unit /		Universal Averages
MI/HR ON UNIT		23,100		15,000		Location
SAMPLE DATE		03/02/07	04/08/06	Averages
 
ALUMINIUM		3		2		3		3
CHROMIUM		0		1		1		1
IRON			6		4		5		8
COPPER			12		7		10		5
LEAD			1		2		2		5
TIN			0		0		0		1
MOLYBDENUM		2		67		35		77
NICKEL			2		0		1		0
MANGANESE		1		0		1		1
SILVER			0		0		0		0
TITANIUM		0		0		0		0
POTASSIUM		0		0		0		1
BORON			2		35		19		75
SILICON			11		9		10		8
SODIUM			4		4		4		6
CALCIUM			2923		2171		2547		2403
MAGNESIUM		134		11		73		107
PHOSPHORUS		785		601		693		720
ZINC			928		713		821		856
BARIUM			0		0		0		0
 
 
		cST		SUS		VISCOSITY	cST		SUS		FLASHPOINT	FUEL%	ANTIFREEZE%	WATER%	INSOLUBLES%
		VISCOSITY	VISCOSITY	INDEX		VISCOSITY	VISCOSITY	IN F
		@ 40 C		@ 100 F			@ 100 C	@ 210 F
 
VALUES										58-65		>365		<2.0	0		0.0	<0.6
SHOULD BE
 
TESTED										64.7		390		<0.5	0.0		0.0	0.4
VALUES WERE
Current UOA post at Bitog
03/02/07 Castrol Syntec GC 0w-30 - 4100mi - 2005 Subaru WRX

Previous UOA post(s):
Nasioc:
04/08/06 Oil Analysis - Mobil1 10w-30 - 4000 miles - 2005 Subaru WRX 2.0L Turbo

Bitog:
04/08/06 Mobil1 10w-30 - 4000 miles - 2005 Subaru WRX 2.0L Turbo
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Old 04-01-2007, 02:36 AM   #2
drees
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Join Date: Oct 2002
Chapter/Region: SCIC
Location: San Diego, CA
Vehicle:
2003 Silver Wagon
Tuned with Enginuity

Default

Copper isn't that high. But if the M1 10w30 works better, why not go back to that? Maybe a 0w40 or a 5w40...

Does the GC usually have that little moly and boron?
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Old 04-01-2007, 02:44 AM   #3
FD777
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Join Date: Apr 2005
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Location: Santa Clara/Sunnyvale, CA
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2005 WRX Sedan
Crystal Gray

Default

Quote:
Originally Posted by drees View Post
Copper isn't that high. But if the M1 10w30 works better, why not go back to that? Maybe a 0w40 or a 5w40...

Does the GC usually have that little moly and boron?
With M1, the car wasn't driven nearly as hard. I'm only guessing, but I believe the UOA would have been comparable to GC under the same conditions.

Yes and Yes. GC is higher on the Magnesium and Calcium. Different additives, but it gets the job done.
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Old 04-01-2007, 11:45 AM   #4
esteve
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Location: Los Angeles
Vehicle:
2006 STI

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I'd love to see how the M1 10W-30 holds up to a couple of track days!...it would probably become like water.

I'm guessing the track days caused the 1.5 qts oil consumption with the GC? What kind of air filter are you using? It looks like silicon could be a tad lower, but it's not bad at all.

I wonder what kind of car that Blackstone car drives...my guess is a 911 turbo.
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Old 04-01-2007, 01:31 PM   #5
orndog
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If she smokes she
pokes

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I just went to the GC last oil change, so far no oil useage issues with almost 80k miles on the car.
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Old 04-01-2007, 05:45 PM   #6
bluesubie
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Member#: 767
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Chapter/Region: Tri-State
Location: N.J.
Vehicle:
04 FXT

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If you switch to Delvac 1, it may shear to a 30 weight. I say that from looking at the UOA's of a faithful M1 5W40 Turbo Diesel user on subaruforester.org (FXT).

His M1 Turbo Diesel usually shears to a 30 weight at around 4-5k miles. Completely stock, no track and he his in FL. That's quite a bit of make-up oil though for GC. Maybe you want to go with ester route (new Motul X-Lite 0W30 or RL). Although that would be pricier!

-Dennis
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Old 04-01-2007, 06:16 PM   #7
FD777
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Member#: 84820
Join Date: Apr 2005
Chapter/Region: BAIC
Location: Santa Clara/Sunnyvale, CA
Vehicle:
2005 WRX Sedan
Crystal Gray

Default

I'm itching to try Delvac 1 for the same reason as using GC. . . . Hype! And the fact that they have a solid history.

In no particular order, Motul, Redline, Amsoil would be my next choices.

Sure it may be more expensive, but I look at it this way: if spending an extra $10-$15 for oil extends my OCI AND produces good UOAs, it's worth it. An extra 1K in my OCI is an extra month of NOT doing maintenance.

I enjoy working on the car, but not having a garage makes even simple tasks annoying. Especially in the WINTER!
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Old 04-02-2007, 04:01 PM   #8
#1ratedsti
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Wat bout Sti's
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