PENNZOIL® HD MOTOR OIL is single grade motor oil meeting or exceeding the performance requirements of U.S. and foreign passenger car engines. It contains a balanced blend of select high performance, high VI base stocks and Pennzoil’s additive Z-7®. Z-7® is one of the most advanced of all motor oil additives. PENNZOIL® HD MOTOR OIL is formulated for stop-and-go driving. It is designed to overcome the extreme engine conditions caused by stop-and-go driving.