EFFECT OF NEW LUBRICANTS ON STRETCHING OUT PREVENTATIVE MAINTENANCE INTERVALS

True value of new chassis and engine lubricants can only be determined by tests under actual operating and maintenance conditions. Factors other than just the quality and performance of the lubricant, should be considered before any extension of the lubrication interval is attempted. However, under certain conditions, appreciable extension of the interval is possible with the use of a molybdenum disulfide grease.

In limited tests, using an SAE 30, MTL-0-2104 oil as the reference, a 20W-40 oil gave greater fuel and oil economy whereas an SAE 30, Series 2 oil gave less fuel and greater oil economy. Additional tests for verification and determination of effects upon stretching out the PM interval are needed.