GM used its X-body platform between 1973 and 1984 to produce the Oldsmobile Omega as well as the Chevrolet Nova and Pontiac Ventura and Buick Apollo models. As a rear-wheel-drive system the Oldsmobile Omega used unibody frame construction provided by frame rails that increased its strength and rigidity. Customers who chose the Oldsmobile Omega could select a 250 cu in (4.1 L) inline-six engine which worked together with either a 3-speed manual transmission or a 4-speed manual or a 3-speed automatic transmission option. Users could select from manual or automatic transmission options to optimize their driving experience when opting for the 5.7-liter 'Rocket' V8 engine in particular trims of the Oldsmobile Omega. In 1977 the Oldsmobile Omega moved to the 231 V6 engine with 110 hp replacing the original 115 hp inline-six engine to meet new market requirements for better performance-fuel economy balance. Several developmental phases led to the modernized Oldsmobile Omega which enhanced its interior components and noise-canceled its structure to deliver superior suspension-aided driving stability while receiving the Iron Duke 2.5L four-cylinder and 2.8L V6 engine options during its updated release in 1980. The available powertrains allowed customers to choose between manual transmission with 4 speeds and automatic transmission with 3 speeds using the TH125 transmission. The maintenance of Oldsmobile Omega depends on original parts because they follow factory standards precisely while producing components that fulfill suspension parameters to safeguard the vehicle design and operational integrity.