As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLYING FROM SJC TO IND AT LEVEL OFF THE OIL BUGS WERE SET AT 16QTS ON EACH GAGE TO MATCH THE CORRECT OIL QUANTITY READING. APPROXIMATELY 15-20 MINS LATER, NR 1 ENG OIL QUANTITY DECREASED TO 13 QTS, THEN 5-10MIN LATER WENT TO 12.5 QTS. FO WENT TO THE CABIN ARE AND NOTICED VISUAL INDICATION OF SIGNIFICANT FUMES. DIVERTED TO SLC, OIL QTY CONTINUED TO DECREASE TO 12 QTS WHICH WAS THE LAST INDICATION THAT WE NOTICED BEFORE LANDING. INSTALLED NR 1 ENGINE PER AIRCRAFT MAINTENANCE WORK CARD 64T0100-1.