Oil filter

[0001]FIG. 1 is a front perspective view from above of an oil filter, according to one embodiment;

[0002]FIG. 2 is a front perspective view from below of the claimed design of FIG. 1;

[0003]FIG. 3 is a front view of the claimed design of FIG. 1;

[0004]FIG. 4 is a rear view of the claimed design of FIG. 1;

[0005]FIG. 5 is a right side view of the claimed design of FIG. 1;

[0006]FIG. 6 is a left side view of the claimed design of FIG. 1;

[0007]FIG. 7 is a top view of the claimed design of FIG. 1; and,

[0008]FIG. 8 is a bottom view of the claimed design of FIG. 1.

[0009]Any portion of the article depicted in broken lines forms no part of the claimed design.