Abstract: A mixer for mixing oil and gasoline in a can comprising a mixer disc having a plurality of holes therein, a plunger shaft having its bottom end rigidly connected to the mixer disc, a guide sleeve adapted to be mounted in a mixer opening in the can, a lower spring mounted between the disc and a lower spring stop on the guide sleeve, a handle mounted on the top of the plunger shaft, and an upper spring mounted between the handle and an upper spring stop on the guide sleeve, whereby the handle is pumped up and down, assisted by the springs, to mix oil and gasoline for use in a snowmobile and the like.