The Oldsmobile Aerotechs were perhaps America’s hottest prototypes
By the late 1980s, Oldsmobile tried to differentiate itself from GM’s four other core brands (Chevrolet, Cadillac, Buick, and Pontiac) by promoting its technological advances, starting with the dual-overhead-cam 2.3-liter Quad 4 engine introduced for the 1988 Cutlass Calais. This 150-horsepower cast-iron block and aluminum head four-cylinder soon made its way into other GM products, but as it was designed by Oldsmobile, the brand decided to push it a whole lot further. What’s more, the Quad 4 was also supposed to evolve into a 5.0-liter V-8 called the Quad 8.
Killing Oldsmobile still stands as one of GMs most short-sighted mistakes in my mind.
70s & 80s Olds were hugely popular.
90s Olds were less common (but were they marketed/developed as much as say Saturn?), but examples outlasted peers by years. We still have the odd Intrigue kicking around here. Swiss-cheese rusted and refusing to die.