Room 222 Season 5 Episode 12 MPG ( Air Date 1973-12-28 ) Genre Comedy, Drama category. Overview "The Walt Whitman auto shop enters a car in a contest to see which vehicle gets the most miles per gallon. The actual race is unbearably slow, with each car conserving energy, and the scenes of Mr. Kaufman, Mr. Dixon, et al, trying to stay awake in the bleachers are hilarious. Thanks to Oriole Adams for suppyling this synopsis.".