Distillate Fuel contamination would make the oil viscosity decrease while Residual Fuel contamination would either make the oil viscosity increase or decrease depending on the viscosity of the fuel.

• 馏出燃油的污染可使润滑油粘度下降，而剩余燃油的污染可使润滑油粘度上升或下降，这主要取决于燃油本身的粘度。