Simplify the following text for a Grade 7 native English-speaking person.
Original: Oldsmobile 88 was discontinued after 1999 .
Simplified: The Oldsmobile 88 ( a.k.a. Eighty-Eight ) was a full-size car sold by the Oldsmobile division of General Motors and produced from 1949 until 1999 . From 1950 to 1974 the 88 was the division 's top-selling line , particularly the entry-level models such as the 88 and Dynamic 88 .