Description Pennzoil motor oil exceeds the toughest industry standards based on ILSAC GF-6 and API SP and is engineered to help prevent sludge and other damaging deposits in your engine. It provides a balance between reducing frictional losses and protection against harmful engine wear by getting between moving parts to prevent friction. Pennzoil SAE 5W-20 is a synthetic blend oil, formulated to provide protection against the harmful effects of stop-and-go driving, and low-speed pre-ignition (LSPI) in modern turbocharged engines, and better wear protection than Pennzoil motor oil (based on Sequence IVA wear test using SAE 5W-30).