Unlike traditional synthetics made from crude oil, Pennzoil Synthetics are the modern synthetic made from a proprietary gas to liquid process, resulting in a 99.5% pure base oil and end product that leads to better performance. Pennzoil Synthetic motor oil is designed from natural gas for complete protection. Providing drivers with cleaner pistons, better fuel economy, horsepower protection, unsurpassed wear protection, and excellent performance in extreme temperatures.