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10-10-2003, 08:13 PM
Bob In Ct
Senior Club Cobra Member
Join Date: Mar 2001
Location: Southern Connecticut, CT
Cobra Make, Engine: SPF - 351W, 944 non-turbo
Posts: 2,105
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I use Mobil1 5W-30 year round in my 351W crate. Good pressure all through the RPM range. Idles at 40ish, 55 PSI at 2000. Avoid the Fram filters. Using higher viscosities may lower your pressure!
Bob
Bob In Ct
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