Pennzoil Full Synthetic motor oil is formulated to provide 40% better performance than conventional motor oil (compared to Pennzoil Conventional motor oil), and helps prevent sludge and deposit build up. Pennzoil Full Synthetic motor oil is formulated to help you go longer between oil changes- it is formulated for longer drain intervals than conventional and synthetic blend motor oils. Pennzoil utilizes the advances of synthetic technology to provide improved cleanliness over synthetic blend motor oils. It meets or exceeds the engine protection required by ILSAC GF-6. So if your car already requires full synthetic, or if you're looking to upgrade from conventional or synthetic blend Pennzoil Full Synthetic is the right choice for you.