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Old 04-10-2013, 02:46 PM   #9
Scooby Guru
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
2002 WRX Sedan
Midnight Black


Originally Posted by HowFake View Post
Full synthetic 5-30 quaker state.
Most synthetic 5w30 break down to 20w oil in the turbo subarus. MANY break down to lower viscosity in less than 2000 miles. There may be other contibuting factors, it's not like this kind of oil causes rod knock in 3 pulls or anything, it's a cumulative effect over time.
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