Patent ID: 7018531

Claim:
An oil filter, comprising: a housing having an inlet and an outlet defining a flow path through a chamber defined by said housing; a mechanical filter element disposed inside the filter housing in the flow path, a substantially cylindrical center tube located coaxially within the mechanical filter element; and an additive cartridge in the filter housing with at least part of the additive cartridge disposed inside the center tube, said additive cartridge comprising: a dispenser housing which is a hollow shell defining an additive storage chamber therein, said dispenser housing having at least one hole formed therein and a flange portion depending therefrom for supporting the dispenser housing within said mechanical filter; and an oil additive composition disposed within said additive storage chamber, wherein said dispenser housing defines a first flow path and a second flow path, said first flow path being adjacent to said inlet and said second flow path providing fluid communication to said additive storage chamber and said oil additive composition disposed therein, wherein said dispenser housing further comprises a dividing wall separating said first flow path from said second flow path.