Thread: Performance Motor Break-In Procedure?
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Old 10-06-2011, 08:37 AM
grybrd123 grybrd123 is offline
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Question Break in mileage
That's interesting. For my Roush 427SRX, I was told explicitly by Roush (not the dealer or installer) to use Valvoline 10W-30 racing for 3000 miles and then I could use synthetic if I wished.

grybrd123
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