Need some help. I bought the Autozone special with Quaker State oil and a STP filter for $12.00. I do not know any thing about STP oil filters. I am planning on starting an Auto-Rx treatment tomorrow. Will this filter be ok? Who makes it? I looked at other STP filters and they were the E-core type. This filter i have is the S8316. It looks to be made very well. To be honest it looks like a Mobil 1 filter? It has the red advb valve. Is this just old stock? Any info would be great. Ho does this filter compare to Motorcraft oil filters. Thanks