Narrative:

After our first aircraft was taken OTS; we were given this one that needed oil service in the left engine. Reviewing the logbook showed 150 pints of oil used in the last 10 days; technician was notified and ZZZ maintenance. In the last 3 days 66 pints were used. The last flight took 9 pints; then the next needed 14 pints the same day and a turnaround flight. 23 pints in the last 4 hours. Maintenance control said they had been monitoring the usage and it was in high usage already of 4 pints per hour limit. The engine was now using 8 pints per hour and they said it was still good to go. Meanwhile all parties trying to get us to take the aircraft; except ZZZ maintenance and myself; I checked out the engine and climbed in to take a good look. While at the gate after topping off the oil; the engine lost 1 quart while windmilling. This being at night and now late; I observed oil leaking out on the turbine in aft section. That was it for me; I reported my findings and placed the item in the log. We requested another aircraft and finally took off approximately 4 hours later.

Related reports:

Google
 

Original NASA ASRS Text

Title: B757-200 ACFT PREFLIGHT LOGBOOK REVIEW SHOWED THE LEFT ENGINE REQUIRED 150 PINTS OF OIL IN 10 DAYS; 66 PINTS IN LAST 3 DAYS. ENGINE NOW USING 8 PINTS PER HOUR. MAINT CONTROL SAYS OK TO GO.

Narrative: AFTER OUR FIRST ACFT WAS TAKEN OTS; WE WERE GIVEN THIS ONE THAT NEEDED OIL SVC IN THE L ENG. REVIEWING THE LOGBOOK SHOWED 150 PINTS OF OIL USED IN THE LAST 10 DAYS; TECHNICIAN WAS NOTIFIED AND ZZZ MAINT. IN THE LAST 3 DAYS 66 PINTS WERE USED. THE LAST FLT TOOK 9 PINTS; THEN THE NEXT NEEDED 14 PINTS THE SAME DAY AND A TURNAROUND FLT. 23 PINTS IN THE LAST 4 HRS. MAINT CTL SAID THEY HAD BEEN MONITORING THE USAGE AND IT WAS IN HIGH USAGE ALREADY OF 4 PINTS PER HR LIMIT. THE ENG WAS NOW USING 8 PINTS PER HR AND THEY SAID IT WAS STILL GOOD TO GO. MEANWHILE ALL PARTIES TRYING TO GET US TO TAKE THE ACFT; EXCEPT ZZZ MAINT AND MYSELF; I CHKED OUT THE ENG AND CLBED IN TO TAKE A GOOD LOOK. WHILE AT THE GATE AFTER TOPPING OFF THE OIL; THE ENG LOST 1 QUART WHILE WINDMILLING. THIS BEING AT NIGHT AND NOW LATE; I OBSERVED OIL LEAKING OUT ON THE TURBINE IN AFT SECTION. THAT WAS IT FOR ME; I RPTED MY FINDINGS AND PLACED THE ITEM IN THE LOG. WE REQUESTED ANOTHER ACFT AND FINALLY TOOK OFF APPROX 4 HRS LATER.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.