In order to differentiate it as Oldsmobiles senior level vehicle it was named the Series 90 while remaining below the Buick Special.

To celebrate the company's 44th anniversary at the time, all Oldsmobiles were installed with a small badge on the grille with "B44" attached.

[4] Some of the optional equipment included a choice of a 6-tube or DeLuxe 7-tube radio, electric clock, plastic steering wheel, rear window wiper for both sedans, and auxiliary driving lights.

[4] The standard equipment offered Bedford cord or broadcloth upholstery, front seat retractable center armrests, rubber floor mats, painted woodgrained instrument panel, dual sun visors, dual electric windshield wipers, and an automatic choke for the carburetor for easier starts for a cold engine.

[4] Buyers who chose the DeLuxe trim package were given carpeted inserts in the rubber floor mats, a deluxe instrument with full gauges, a retractable center armrest for the rear seat, the E-Z-I anti-glare rear view mirror and an electric clock.

[7] The previous 78 model was retired with the 1949 introduction of the Oldsmobile 88, which shared its new Futuramic A-body platform with the Seventy-Six but was equipped with the new overhead-valve Rocket V8.

This particular model is particularly rare to find, as it was the only time Oldsmobile offered a six-cylinder engine with the upscale hardtop feature.

[4] The hardtop was built by welding a steel roof onto the convertible body style, which simplified assembly line operations.