Relyant Full Synthetic Multigrade Passenger Car Motor Oils (PCMO) are formulated to provide outstanding engine protection and performance under severe operating conditions. They are blended from synthetic base stocks  and compounded with additive chemistry to deliver superior deterrence against wear and corrosion, restrict oxidative thickening and inhibit promotion of engine acids, sludge and varnish deposits.  These series of multigrade oils may be used over an extreme temperature range to permit easier cold weather starting and help minimize engine friction at start-up.  They also provide added protection at higher than normal engine operating temperatures. These viscosity grades oils are designed to help maximize fuel economy.