A device, system, and method for retrieving a sample of oil from an engine, comprising, a chamber having an inside wall and at least one oil inlet, a piston head received in said chamber and slidable between an empty position in which it is disposed substantially at said inlet and a filled position in which it is a first distance from said inlet, a handle affixed to said chamber, and a piston member extending between said handle and said piston head, said piston member comprising a flexible member having a proximal end and a distal end, said distal end being affixed to said piston head.