Lots of places sell it. Check your local parts store(some Auto-Zone and Advance Auto Parts sell it). If not you can get it from most FRPP dealers, check your dealership if they are one. If not you can order from MustangsUnlimited, but they are a little pricey.
And dont get the K&N oil filter, check out the FRPP oil filter
Seen Royal Purple at Napa and Pep Boys and some speed shops or you can order online. Seen K&N oil filters at Advanced Auto Parts. Both royal purple and K&N have "dealer locater" on their websites.
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