Ford Mustang Forum - View Single Post - Castrol Synthetic Oil
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post #3 of (permalink) Old 02-20-2006
ts3096
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Joined: Feb 2006
Location: Harrisonville, NJ
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The synthetic oil is definitely worth some power. I couldn't tell you exactly what it is worth in you street car, but I have built a few high HP BBC's, and through dyno testing, have seen as much as 15 HP in switching from conventional 10W-30 to a Mobil 1 synthetic 10W-30.
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