I recently bought a 10 gallon 115psi Jobsmart compressor at Tractor Supply Inc.
It came with 1 quart (or maybe liter) of oil. 2/3 of the oil was used when new to fill it up to a sight level mark. I've run it maybe 4 hours of run time, and it just drank the remaining 1/3 liter of oil.
The book...