Hi there!
The Pennzoil motor oil (PYB) and Quaker State Advanced Durability are our conventional motor oils in each line up. For similarities, they both are conventional base oils and they meet the same OEM specifications. No other leading conventional oil provides better wear protection than Pennzoil conventional motor oil in addition to helping prevent sludge deposits, controlling high temperature oxidation and deposits, improving fuel economy and has LSPI protection for today's turbocharged engines. Quaker State Advanced Durability gives you twice the wear protection set by OEMs, maintains required viscosity from start to finish providing optimal protection, offers corrosion protection and LSPI protection for turbocharged engines.
Thanks,
Gena