Pennzoil 5W-30 Full Synthetic motor oil is designed to let you go farther between oil changes. It provides better engine protection and is backed by a 10,000-mile protection guaranted to give you peace of mind that your engine is protected now and for all the miles ahead. Pennzoil Full Synthetic motor oil is formulated for longer drain intervals than conventional and synthetic blend motor oils, offers enhanced wear protection in high and low temperatures, provides excellent resistance to oil breakdown in severe environments, and helps prevent sludge and deposit build-up. Suitable for both new and old engine.