Pennzoil Platinum® Full Synthetic motor oil with PurePlus™ Technology is designed to give engines complete protection. PurePlus™ Technology is a revolutionary process that converts natural gas into a 99.5% pure base oil. Combining it with high performance additives means Pennzoil Platinum® Full Synthetic motor oil is proven to keep pistons up to 40% cleaner than the toughest industry standard, based on ILSAC GF-5.