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Old 05-16-2011, 03:36 PM   #3
Concillian
Scooby Guru
 
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:
2002 WRX Sedan
Midnight Black

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It was Redline, and, as mentioned, brand new oil acted the same. The new oil was not Redline. Knowing it was potentially a really short interval I used the cheap stuff, normal 5w30 GTX I use in my wife's oil guzzling Corolla, but I'm pretty sure that didn't shear to the same point in 25 miles of freeway driving. Brand new 5w30 should be higher than 8-10 psi @ hot idle.

With the new oil, I think I have pretty much ruled out oil dilution and shearing.
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Last edited by Concillian; 05-16-2011 at 04:37 PM.
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