The paper presents the results of experiments on electrostatic and tribological aspects of different anti-wear additives contents when an additive is blended with different fully synthetic(poly-α-olefin)and PAG(polyalkylene glycol)base oils in a rotating shaft-oil and oil-lip seal interfacial system.The experimental results are the relationships of electric potential induced in a lip seals stiffening ring to angular velocity of a rotating metal shaft and to temperature of the oils tested.