In a paper recently presented to the Automobile Division of the Institution of Mechanical Engineers, MR. A. T. WILFORD, B.Sc, F.Inst.Pet., Chief Chemist (Road Services) of the London Transport Executive, outlined the results of considerable experience and testing with lubricating oils on C.I. engined public service vehicles operating in and around London. The following is a condensation of those parts of his paper which referred to oil change periods, effects on lubrication of high sulphur content fuel oil, advantages of low viscosity winter oils and results of tests using detergent oils.
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