Abstract: An angular, one-piece, box-end wrench specifically designed to access and grip onto the oil filter Dorman filler cap of the newly designed General Motor (GM) combustion engines, more specifically the GM 2.2L and 2.4L ECOTEC 1-4 engines, comprising of a handle grip, a handle shaft and a box-end wrench. The inventive device includes a handle grip with a 90 degree perpendicular bend forming an elongated handle shaft with a second 100 degree bend distally spaced and opposite to the handle grip accommodating a hex box-end body sized to fit and access the above stated GM oil filter cartridges for maintenance and replacement.