The invention relates to a pressure- and temperature-controlled valve (1) in an oil circuit (2) of a combustion engine (3), comprising a pressure-controlled piston (4) which is mounted in a cylinder (5) such that it can be translationally adjusted, and which is raised from a valve seat (7) in a first position, thereby permitting a through-flow through the valve (1), while the piston (4) is pressed on the valve seat (7) by a valve head (6) in a second position, closing the valve (1), wherein the piston (4) divides the cylinder (5) into a pressure chamber (8) and a counter pressure chamber (9), wherein a return spring (10) is arranged in the counter pressure chamber (9), wherein the pressure chamber (8) has a supply opening (11) which can be opened and closed depending on the temperature by a bimetallic element (12) or a switch element (13) having a shape-memory alloy.
