![Transcription Center logo](/themes/custom/tc_theme/assets/image/logo.png)
This transcription has been completed. Contact us with corrections.
[[image]] How Reliable can an Aircraft Engine be? From the moment an airliner's propellers bite the air — to the time hours later when their thundering engines are cut, oil fights a constant battle against damaging heat and friction. An engine's performance is only as reliable as the oil that lubricates it. To maintain their reputation for dependability, the top airlines in the nation specify the very best in Aircraft Oils. Today, more than 45% of the oil used by major scheduled airlines in the U. S. is supplied by Sinclair. There is no better proof of dependability. SINCLAIR AIRCRAFT OILS Sinclair Refining Company, Aviation Sales 600 Fifth Avenue, New York 20, N.Y.# 4 OFFICIAL PROGRAM and LOG