The first generation of Oldsmobile Cutlass Supreme was introduced for the 1966 model year. In 1966, the Cutlass Supreme was a trim level on the Oldsmobile Cutlass, but starting in 1967, the Cutlass Supreme became its own model. The first generation of Cutlass Supreme was fitted with a 5.4L V8 engine, and was available in a variety of open and closed top body styles. Production of the first generation Cutlass Supreme lasted until 1967, when it was replaced by the Second Generation Oldsmobile Cutlass Supreme.