Additive dispersing filter and method of making

1. A method for dispersing an oil additive into an oil passing through a filter of an engine, the method comprising:

filling a first cavity of an additive cartridge with an oil viscosity modifier configured to reduce a viscosity of the oil, the first cavity being adjacent to and separated from a second cavity of the additive cartridge;

locating the first cavity and at least a portion of the second cavity of the additive cartridge within a filter element disposed within a housing of the filter, the first cavity and the second cavity of the additive cartridge being centrally located within an inner area defined and surrounded by the filter element and within a flow path through the filter, the second cavity being separated from the first cavity by a dividing wall and the second cavity does not have any additive disposed therein, the second cavity defining a first fluid path through the additive cartridge and the oil must pass through the second cavity in order to exit the filter, wherein the first cavity is completely received within the filter element and at least a portion of the second cavity is also received within the filter element; and

metering the additive through an opening in the additive cartridge, the opening providing a second fluid path only in fluid communication with the first cavity of the additive cartridge.

2. The method as in claim 1 , wherein the additive cartridge is located substantially centrally in a housing of the filter and the first fluid path is defined by at least two openings in the additive cartridge neither of which provides fluid communication to the first cavity.

3. The method as in claim 1 , wherein the additive cartridge is formed from an oil intolerable plastic.

4. The method as in claim 1 , wherein the additive is a gel.

5. The method as in claim 1 , wherein the first cavity is positioned below the second cavity and the second cavity is positioned adjacent to an outlet opening of the filter.

6. A method for extending the useful life of a lubricating oil of an internal combustion engine by dispersing an oil additive into the lubricating oil passing through a filter coupled to the internal combustion engine, the method comprising:

filling a first cavity of an additive cartridge with an oil viscosity modifier oil viscosity modifier configured to reduce a viscosity of the oil through an opening defined at a distal end of the additive cartridge, the first cavity and the opening at the distal end of the cartridge being defined by a wall of the additive cartridge and the first cavity being adjacent to and separated from a second cavity of the additive cartridge, the second cavity of the additive cartridge also being defined by the wall of the additive cartridge;

curing the oil viscosity modifier in the first cavity such that when the additive cartridge is inverted and the opening at the distal end of the cartridge is below the first cavity and the second cavity, the cured additive remains in the first cavity;

locating the first cavity and at least a portion of the second cavity of the additive cartridge within a filter element disposed within a housing of the filter, the first cavity and the second cavity of the additive cartridge being centrally located within an inner area defined and surrounded by the filter element and within a fluid flow path through the filter, the second cavity being separated from the first cavity by an internal dividing wall of the additive cartridge and the second cavity being free from cured oil viscosity modifier disposed therein, the internal dividing wall completely separating the first cavity from the second cavity, the second cavity defining a first fluid path through the additive cartridge and the lubricating oil must pass through the second cavity in order to exit the filter, wherein the first cavity is completely received within the filter element and at least a portion of the second cavity is also received within the filter element; and

metering the oil viscosity modifier through an opening in the additive cartridge, the opening providing a second fluid path, the second fluid path only providing fluid communication into the first cavity of the additive cartridge.

7. The method as in claim 6 , wherein the additive cartridge is located substantially centrally in a housing of the filter.

8. The method as in claim 6 , wherein the additive cartridge is formed from an oil intolerable plastic.

9. The method as in claim 6 , wherein the additive is a gel.

10. The method as in claim 6 , wherein the additive cartridge is disposed on a clean side of the filter element disposed in the filter.

11. The method as in claim 10 , wherein the additive cartridge is formed from an oil intolerable plastic and the additive is a gel.

12. A method for dispersing an oil additive into an oil passing through a filter, the method comprising:

forming an additive cartridge, the additive cartridge having a cylindrical shell portion having a first opening at one distal end of the cylindrical shell portion and a second opening at an opposite distal end of the cylindrical shell portion;

separating an interior of the shell portion into a first cavity and a second cavity by locating a dividing wall within the cylindrical shell portion;

filling the first cavity of the additive cartridge with an oil viscosity modifier through the first opening, the first cavity being adjacent to and separated from the second cavity of the additive cartridge;

curing the oil viscosity modifier in the first cavity such that when the additive cartridge is inverted and the first opening is located below the first cavity and the second cavity, the cured oil viscosity modifier remains in the first cavity;

locating the first cavity and at least a portion of the second cavity of the additive cartridge within a filter element disposed within a housing of the filter, the first cavity and the second cavity of the additive cartridge being centrally located within an inner area defined and surrounded by the filter element and within a fluid flow path through the filter, the second cavity being free from cured oil viscosity modifier disposed therein and defining a first fluid path through the additive cartridge wherein the oil must pass through the second cavity in order to exit the filter and wherein the first cavity is completely received within the filter element and at least a portion of the second cavity is also received within the filter element; and

metering the oil viscosity modifier through at least one other opening in the cylindrical shell portion of the additive cartridge, the at least one other opening being located below the dividing wall and providing a second fluid path for providing fluid communication into the first cavity of the additive cartridge, the second fluid path only providing fluid communication into the first cavity and wherein the oil viscosity modifier is configured to reduce a viscosity of the oil.

13. The method as in claim 12 , wherein the additive cartridge is located within a center tube having a plurality of openings and wherein oil passing through the filter must first pass through the filter element before passing through the additive cartridge.

14. The method as in claim 12 , wherein the additive cartridge is supported in the housing by a flange portion that extends from the cylindrical shell portion of the additive cartridge and a plurality of openings are formed in the cylindrical shell portion to define the first fluid path through the additive cartridge.

15. The method as in claim 1 , wherein the additive cartridge is located within a center tube having a plurality of openings and wherein oil passing through the filter must first pass through the filter element before passing through the additive cartridge.

16. The method as in claim 6 , wherein the additive cartridge is located within a center tube having a plurality of openings and wherein lubricating oil passing through the filter must first pass through the filter element before passing through the additive cartridge.