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UOA: Castrol Syntec 5W-40, 6350 miles from August to late December.

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Old 12-29-2005, 05:36 AM
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Default UOA: Castrol Syntec 5W-40, 6350 miles from August to late December.
<center><img src="http://pictureposter.audiworld.com/91185/s4_fall_2005_uoa.jpg"></center><p>I think it looks ok...It did thin out somewhat and Iron might be bit on the high side...

GC 0W-30 went in last week...We will see on the spring how it hled up..
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Old 12-29-2005, 05:44 AM
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Default I think GC 0W-30 is the better choice for the winter...
Interesting that it lost viscocity. M1 is known for doing this but not Syntec.

Stephen
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Old 12-29-2005, 05:52 AM
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i need to do this too , and i feel sick to my stomach when i think about it (results)...
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Old 12-29-2005, 05:57 AM
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Default Agreed!! I think GC is fine for summer 2!
Over the course of this OCI I added 16oz of lube control which has about 20 wt viscosity so maybe that might have contributed to lower overall viscosity?

I love 0 bearing wear though :-))!!
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Old 12-29-2005, 05:58 AM
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You can doooo itttt :-))
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Old 12-29-2005, 06:09 AM
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nice report. I have my old UOAs in my pic poster. I run 7,500 mi between changes, with no problems.
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Old 12-29-2005, 06:10 AM
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oops forgot to add I typically use AMSOIL 5w40, 0w30 or M1 0w40
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Old 12-29-2005, 06:30 AM
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Default That probably explains it...
And I agree about GC in the summer though I feel more comfortable with M1 0W-40 in the summer and GC in the winter.

Stephen
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Old 12-29-2005, 06:38 AM
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Default Where did ou get your boost gauge?
You live in NOVA?

I am in Falls Church, VA..U?
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Old 12-29-2005, 06:39 AM
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how much does it cost to do one of these tests?
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