| NOTE: TABLE IS BASED ON A FUEL OIL VISCOSITY OF 3.0 AT 40°C This tabulation may be used to determine the approximate percentage of fuel oil contained in a sample of used diesel engine lubricating oil if the kinematic centistoke viscosity at 40° C of the used oil and of the oil when new is known. To use this chart, pick the column headed by the viscosity nearest that of the new oil. in that column, find the viscosity nearest that of the used oil sample, and in the same horizontal line, in the outside columns (headed "fuel oil dilution") is given the percentage of fuel dilution. Viscosity of the used oil sample may be determined in the laboratory by a standard kinematic viscosimeter, or it may be obtained with sufficient accuracy by the use of a portable viscosimeter such as the Visgage. The viscosity of the oil when new may be obtained in the same way, or taken from the supplier's specification. Example: a sample of used oil is found to have viscosity of 137 CST. at 40°C. the oil when new had a viscosity of 160 CST. at 40° C. in the column headed by 160 CST., a viscosity of 137 CST. lies in the horizontal line corresponding to a fuel dilution of three percent. | 
