"NW_PILOT" writes:

When I was looking for an airplane. I had a guy give me an excuse
why no oil changes were logged during his ownership! He said it
burnt 1 QT every 4 to 5 hours so in 25 hours [...]

Did he instead log each addition those quarts of oil? In Canada, such
"elementary work" is required to be logged, and so is "preventive
maintenance" in the US (FAR 43.9).

- FChE