New. Trend in Fu el and Lubricants
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N the future, this country's oil 'engines would be operating exclusively on Middle East crudes, which were of relatively high sulphur content, Mr. R. J. Ginn, of the Anglo-American Oil Co., Ltd., told the December meeting of the Institute of Road Transport Engineers (North Western Centre). Most British equipment hsd been designed for a maximum sulphur content of 0.5 per cent., but that element was now rising to 0.7 per cent
The Americans had had far more trouble from this source and he thought that the top limit for sulphur should be something under 0.8 per cent.
Mr. Ginn said he was convinced that, as a rule, manufacturers did not take sufficiently into account circumstances
• in which engines could not be kept under the equivalent of laboratory control Fixed lubricating-oil change periods were quoted, but with those vehicles whete some replenishment was frequently needed there was obviously less necessity of complete oil changes at the scheduled times. Reclamation was frowned upon by the oil companies, because used oil contained a great deal of corrosive acid. The normal filter removed solids, but not the acids. A reasonable compromise was the employment of reclaimed oil for topping-up purposes.
The user who was buying detergent oils would be well advised to take the heavy-duty detergent type. Detergent elements prevented the products of oxidation, carbon and other elements from binding together in the form of sludge.
American Series II heavy-duty detergent oils had been introduced which were effective in dealing with over 1.5 per cent, of sulphur content, but their cost was about 30 per cent. higher than that of the normal H.D.
grade. A31