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Old 01-03-2011, 08:49 AM   #3
SeanZ4
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Join Date: Jan 2009
Location: kansas
Posts: 447
Garage
I too made the switch from Mobile to Castrol Syntec 5w-40. I didn't do a flush though??? I did find a great year end deal at Advance Auto Parts for $4.99/qt. It was the cheapest around I could find anyway. What do you gain by doing a flush with the Valvoline 20w-50?

sean
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