The present document discloses a plate type heat exchanger for an oil cooler, comprising at least two heat exchanger members, each enclosing a respective first cavity (C1), at least one inlet port (20, 22), for feeding a medium to the first cavities and at least one output port (21, 23) for extracting the medium from the first cavities (C1); and at least one mounting member (13, 14), which is attached to an outside of an outermost one, as seen in a stacking direction (Z), of the heat exchanger members. A second cavity (C2) is formed between the at least two heat exchanger members. A medium present in the second cavity (C2) is isolated from a medium present in the first cavities (C1). A reinforcement plate (30, 31) is located on an inside of the outermost one of the heat exchanger members, and at least partially overlapping the mounting member (13, 14).
