Lubricating oils of improved initial and long term metal corrosion inhibiting properties comprises a base stock containing one or more hydrodewaxate or hydroisomerate base stock andor base oil, GTL base stock andor base oil, or mixtures thereof, preferably GTL base stock andor base oil, boiling in the lubricating oil boiling range and an additive amount of an anti-corrosion additive. The system senses sphincter pressure and sends the information to a stimulator that is capable of stimulation therapy to control sphincter contractility, thus reducing unwanted urinary incontinence. The method comprises measuring an intensity of the ambient light, comparing the measured ambient light intensity to an intensity of light projected by the projector onto the gradual shading region, and generating apparent gray scale levels for the pixels to be displayed in the pixel locations in the gradual shading region based on the comparison.