Comparison of Single Grade and Multiviscosity Lubricants in M60 Tanks under Hot Ambient Conditions

摘要

In this program, two MIL-L-2104D lubricants, OE/HDO-15/40, an d one SAE 50-grade lubricant were evaluated in three M60A2 RISE passive tanks. The tanks, with AVDS-1790-2C engines, were used to evaluate these lubricants under high ambient temperature conditions. As a result of this program, no significant differences in engine oil operating temperatures were found between the MIL-L-2104D 15W-40 or 40 grades and the SAE 50-grade lubricants. Although significant differences were noted in operating temperatures among vehicles, these differences were larger than any observed oil differences. In addition, no difference was noted in idle oil pressure between the OE/HDO-40 and the SAE 50-grade lubricants in fully warm engines. It was noted that the OE/HDO-15/40 oil produced approximately 1-psi lower oil pressure at idle than the SAE 50 grade in fully warm engines. However, engine-to-engine difference in idle oil pressure was larger than the oil viscosity-related differences. Comparison, Lubricants, High temperature, Atmospheric temperature, Tank engines, Engines, Lubricating oils, Pressure, Low pressure. (jes)