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......