Abstract: Apparatus for testing grease characterized by a base carrying at least two anvils for receiving grease to be tested for impact resistance, two display means surrounding the anvils for displaying any grease splattered therefrom under impact, at least two hammers carried by a pivotally mounted bracket that is freely pivotally movable so as to deliver the hammers into impact with the respective anvils and any grease thereon responsive to force, a spring for biasing the bracket and the hammers toward the anvils with a predetermined force for delivering the impact. Preferably, also, a latch is disposed on the base for holding the bracket in the predetermined angular position prior to delivering the impact when released. Also, disclosed are specific preferred embodiments and structural elements.