Lucas 32 oz. Heavy-duty Oil Stabilizer. It is a preventative maintenance solution that virtually eliminates dry starts and wear, extending oil life and lowering oil temperature in any engine, gas or diesel. This stabilizer raises oil pressure, stopping smoking, leaking, knocking, and blow by in worn engines. It also eliminates noise, overheating, leaks, and wear in gear boxes. ASTM D-1298, D-445, D-92 specified.