Thread: what engine oil for a cosworth
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Old Jan 8, 2004 | 09:40 PM
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PJay
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From: hertfordshire
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Use castrol GTX 10w40 for the running in with a new filter and then switch to mobil 1 again with a new filter once it's run in, the engine can't be fully mapped untill it's run in anyway.

PJay
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