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Walmart on the Mobil 1 http://www.mobiloil.com/USA-English/MotorOil/Car_Care/AskMobil/Walmart_Collection.aspxAnd you DO NOT need to run the exclusive 4T to get the same effect with Mobil 1 10-40w Car Oil.
i get 10% over cost at my local dealer. you want me to order a case of filters for ya?