An engine oil filtration and temperature regulation assembly mountable on a vehicle engine fluidically connectable to an engine oil circulation system, wherein the assembly comprises: a) an oil filtration group; b) a heat exchanger group; c) a fluidic connection and support group suitable to be engaged to the engine; said group supporting the filtration group and the heat exchanger group; said group comprising: i) a base plate comprising at least one oil inlet mouth suitable to be fluidically connected to receive oil from the engine, at least one oil outlet mouth suitable to be fluidically connected to return filtered oil to the engine; ii) a support and fluidic connection device, placed between the base plate and filtration group and/or heat exchanger group, comprising: - a multi-layer assembly comprising a plurality of overlappable plate-shaped elements (5101, 5102, 5103, 5104, 5105, 5106), wherein each plate-shaped element (5101, 5102, 5103, 5104, 5105, 5106) has a plurality of openings each defined by a respective opening edge, in such a way that said openings are overlappable and constitute respective ducts (5100, 5200) suitable to create a fluidic connection between engine and oil filtration group and/or heat exchanger group; the assembly being characterized by the fact that the heat exchanger group has an inlet and filtration chamber in which is housed the filtration unit. a) an oil filtration group; b) a heat exchanger group; c) a fluidic connection and support group suitable to be engaged to the engine; said group supporting the filtration group and the heat exchanger group; said group comprising: i) a base plate comprising at least one oil inlet mouth suitable to be fluidically connected to receive oil from the engine, at least one oil outlet mouth suitable to be fluidically connected to return filtered oil to the engine; ii) a support and fluidic connection device, placed between the base plate and filtration group and/or heat exchanger group, comprising: - a multi-layer assembly comprising a plurality of overlappable plate-shaped elements (5101, 5102, 5103, 5104, 5105, 5106), wherein each plate-shaped element (5101, 5102, 5103, 5104, 5105, 5106) has a plurality of openings each defined by a respective opening edge, in such a way that said openings are overlappable and constitute respective ducts (5100, 5200) suitable to create a fluidic connection between engine and oil filtration group and/or heat exchanger group; i) a base plate comprising at least one oil inlet mouth suitable to be fluidically connected to receive oil from the engine, at least one oil outlet mouth suitable to be fluidically connected to return filtered oil to the engine; ii) a support and fluidic connection device, placed between the base plate and filtration group and/or heat exchanger group, comprising: - a multi-layer assembly comprising a plurality of overlappable plate-shaped elements (5101, 5102, 5103, 5104, 5105, 5106), wherein each plate-shaped element (5101, 5102, 5103, 5104, 5105, 5106) has a plurality of openings each defined by a respective opening edge, in such a way that said openings are overlappable and constitute respective ducts (5100, 5200) suitable to create a fluidic connection between engine and oil filtration group and/or heat exchanger group; - a multi-layer assembly comprising a plurality of overlappable plate-shaped elements (5101, 5102, 5103, 5104, 5105, 5106), wherein each plate-shaped element (5101, 5102, 5103, 5104, 5105, 5106) has a plurality of openings each defined by a respective opening edge, in such a way that said openings are overlappable and constitute respective ducts (5100, 5200) suitable to create a fluidic connection between engine and oil filtration group and/or heat exchanger group;