The ornamental design for an engineoilcontainerholder, as shown and described.
FIG. 1 is a front, top and right side perspective view of an engine oil
container holder showing my new design, the broken-line disclosure of an
engine oil container being for illustrative purposes only and forming no
part of the claimed design;
FIGS. 2 and 3 are respectively front and rear elevational views thereof;
FIG. 4 if a side elevational view thereof, the side opposite being a mirror
image; and,
FIGS. 5 and 6 are respectively top and bottom plan views thereof.