Three models, the Luxury sedan, Regency coupe, and Regency sedan were available in the Ninety-Eight series from Oldsmobile in 1981. Fuel efficient at 22.5 miles per gallon, improvements came from higher pressure tires, improved aerodynamics, the use of on-board computer and more. 1982 Oldsmobile Ninety-Eight Regency Diesel Test Drive 1983 Oldsmobile Ninety-Eight Regency Promo 1985 … Continue reading 1981 Oldsmobile Nintey-Eight Manufacturer Promo