Gardco introduced its Insta Visc Viscosity Calculator.   Simply input the drain time or viscosity into one of the given input fields and then select the type of viscosity cup you are working with to calculate the viscosity or drain time of your sample.   If the selected cup is highlighted in green, that means you are within the cups viscosity range and the number is valid.     If you are outside of the cups range, an error message will appear, meaning you are outside the tolerance ra...