Lubricants For Highly Turbocharged Direct-Injection Diesel Engines

European legislative pressures with regard to power/weight ratio and exhaust smoke levels, in conjunction with a market demand for low fuel consumption, have led to the development of turbocharged direct-injection diesel engines with brake mean effective pressure ratings in excess of 160 psi for truck operation. This trend has resulted in increased incidences of field problems involving high oil consumption and ring seizure resulting from cylinder wear or bore polishing as it is known in Europe.

A laboratory engine test procedure, which is one of several alternatives, has been used to develop lubricants suitable for these highly turbocharged diesel engines.