The Oil Prince (German: Der Ölprinz) is a 1965 West German-Yugoslav western film directed by Harald Philipp and starring Stewart Granger, Pierre Brice and Harald Leipnitz. It was also known as Rampage at Apache Wells. The screenplay is based on a novel by Karl May and was one of a series of film adaptations of his work made by Rialto Film. The film was shot at the Spandau Studios in Berlin and on location in Yugoslavia. The film's sets were designed by the art director . It recorded admissions of 409,817 in France, 1,449,558 in Spain, and over 3 million in Germany.