The 95 percent distillation is the preferred point since its reproducibility is acceptable and it is closer to the fuel s end point than the 90 percent point currently measured in D 975. In addition, reporting the 10 percent distillation and 50 percent distillation points is recommended because they are part of the Cetane Index calculation. Equipment in applications which operate at low loads and frequent idle periods should benefit from a lower end point. The copper strip corrosion test indicates potential compatibility problems with fuel system components made of copper alloys such as brass or bronze. The limit requires that the fuel not darken these parts under the test conditions.
Flash point varies inversely with the fuel s volatility.
Flash point minimum temperatures are required for proper safety and handling of diesel fuel. Due to its higher flash point temperature, diesel fuel is inherently safer than many other fuels such as gasoline. This property is listed simply as a reminder that there are both Federal and State limitations on diesel fuel aromatics content. Kinematic Viscosity Viscosity affects injector lubrication and fuel atomization. Fuels with low viscosity may not provide sufficient lubrication for the precision fit of fuel injection pumps or injector plungers resulting in leakage or increased wear.