Thread: What Oil for new engine
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Old 06-15-2009, 10:57 PM
SwiftDB4 SwiftDB4 is offline
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Cobra Make, Engine: SPF GT40
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I have a similar engine (Roush 427SR). They recommended 10-30W for 3000 mile break in. I did mine for 1500 miles then switched to 15-50W synthetic since I do track days.
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