Pennzoil SAE 30 Motor Oil, 1 qt., 550034991 at Tractor Supply Co. Buy Pennzoil SAE 30 Motor Oil, 1 qt., 550034991 at Tractor Supply Co. Great Customer Service. Skip to Main Content [ "catentry_id" : "99525", "buyable" : "true", "enabled" : "true", "Attributes" : , ]