Regent Diesel Pros was created by head mechanic, Sal Escamilla. Sal is a skilled diesel mechanic with Regent Coach Line, a San Antonio-based charter bus company established in 1999.  Regent Diesel Pros was created after two decades of filling a need in the San Antonio area to not only service Regent Coach Line's private fleet but the coaches of other area operators as well. The company specializes in motorcoach diesel engine repair and maintenance in and around the San Antonio area.