National Geographic : 1949 Oct
SINCLAIR -A GreatNamein Oil JKVa ~ r A/iis Don' fYr Sofor /uiricalionwe ook /o /e leaders1 " Says CAPTAIN EDDIE V. RICKENBACKER President and General Manager, Eastern Air Lines Eastern Air Lines' notable operat ing record is due in large part to its strict standards of aircraft mainte nance. Only the finest lubricating oils and greases can meet Eastern's exacting requirements. Eastern Air Lines uses Sinclair Another reason why... SINCLAIR is a "Great Name in Oil" aircraft engine oil exclusively. Its confidence is based on Sinclair's de tailed knowledge of every phase of aviation lubrication.