Produced by Houston-based Pennzoil Motor Oil Company's Director of Public Relations Vince Guarino, this promotional film surveys various sectors of the petroleum industry across the United States. While describing the company's processes and byproducts, the film also spotlights the work done by specific employees, focusing on their contribution to the self-sufficiency and success of the nation. It's a Pennzoil Day! According to Guarino, the project began as a pair of corporate institutional television advertisements. Executives were so taken by the finished spots, however, that they also requested the corporate image film seen here, shown at annual shareholders meetings. Costing about $700,000, the film originally included a Sound-of-Music-like ending featuring an aerial shot of a cowgirl and cowboy getting married at Vermejo Park Ranch in New Mexico. Management asked for a less emotional ending, resulting in the shot of Pennzoil Place in Houston seen in the final cut. Guarino founded his own Houston-based practice, Guarino Communications, in 1977. The business remained in operation until he moved to California in 1997.