18th January 1957, Page 56
18th January 1957
Page 56

Page 56, 18th January 1957
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Detergent Oils Are Safe
No Damage to Engines by Removal of Deposits S PECIAL tests and controlled investigations had failed to establish that detergent oils, even of the most power, ful kind in use......
• Advantage Of Oilers Declining
Efficiency of New Petrol Engines Increasing T HE economic -advantage of the oil engine was being reduced, first, by the increasing efficiency of new petrol engines designed to......