Why is viscosity important?
Viscosity is extremely important when selecting gear oils as it significantly determines the formation of a lubricant film. By increasing the viscosity of the lubricating oil this creates a thicker lubricant film which in turn improves the anti-wear and dampening properties as well as scuffing load capacity.
As the temperature rises the viscosity reduces, as the load increases the viscosity also increases. Increased churning and squeezing losses can produce excessive heat, especially at high peripheral speeds. If the viscosity of the gear oil is too low then this can result in increased wear.
Temperature is a huge influencer of viscosity, when the temperature changes so does the viscosity. This is usually determined by means of the viscosity index (VI). The higher the viscosity index (VI) of a gear oil, the less the viscosity changes with temperature.
Comment: How engineering innovations are transforming washing machine accessibility
I wonder if Mr Sawhney has considered a sit-on version, with pedals?