Used Cars is one of Robert Zemeckis' pre-Roger Rabbit and pre-Forrest Gump efforts starring Kurt Russell is a devious car salesman who goes to work for affable but monumentally unsuccessful used car dealer Jack Warden. Warden's principal rival is his more prosperous twin brother, also played by Warden, who schemes to take over the "good" brother's lot. After a series of raunchy vignettes, the film boils down to an every-man-for-himself price war between the two Wardens, which rages on even after we're one Warden short. The supporting cast of Used Cars is populated by such reliables as David L. Lander, Michael McKean, Al Lewis, Dub Taylor, Dick Miller and Betty Thomas.
~ Hal Erickson, All Movie Guide