The 1999 Oldsmobile Eighty-Eight is available as a 4-door, 5-seat sedan. Starting at $23,555, the 1999 Oldsmobile Eighty-Eight Base is powered by a 3.8L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 29-mpg on the highway. The top of the line 1999 Oldsmobile Eighty-Eight 50th Anniversary Edition, priced at $27,350, is powered by a 3.8L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 29-mpg on the highway.