Improved fuel economy in certain engine configurations
Better lubrication during extreme cold weather starts
Increased horsepower & torque due to less initial drag on engine
Superior protection against “ash” & other deposit formation in engine hot spots (in particular in turbochargers & superchargers) for less oil burn-off & reduced chances of damaging oil passageway clogging
Decreased evaporative loss
Better chemical & shear stability
Better viscosity index
Resistance to oxidation, thermal breakdown, & oil sludge problems
Possibility to extended drain intervals, with the environmental benefit of less used oil waste generated
Better low- & high- temperature viscosity performance at service temperature extremes
Last benefit among the advantages of synthetic oil: improved fuel economy