Oil capacity: 350mL
1st run(see above): 1:17
—— Run condition: 1500W heater + 2 dehumidifiers
2nd run (not shown): 1:10
—— Run condition: same as 1st run
—— ~1/5 material on magnetic drain plug as 1st run
—— Used RT5 ~1/2 as opaque
3rd run: 1:03 (3:30 total run time from new)
—— Run condition: only 1500W heater
—— Very little ferrous material on drain plug
—— Used RT5 dark amber (see below)
What you see in the clear dish are stains on the desk below; the oil is clear and there was no visible sediment.
Final (4th) Oil Fill: RT6 5W-40, changes at OM recommended intervals.