Premature Loss of Oil Consumption Control in a Heavy Duty Diesel Engine

The effect of some engine operating condition variables on loss of oil consumption control is discussed. A 200 hour multi-cylinder diesel lab engine test procedure is described which has shown the ability to assess the relative performance of lubricating oil formulations. The relationship of various parts rating measurements to oil consumption is shown. The detrimental effect of piston crownland deposits on oil consumption is demonstrated.