Performed the first 50ish? hour service on the Quincy today. 1.7 qts Quin-Cip iso-100 sae 30. Ran another 0- 175 pump up test to see how much it improved during the past year of break in. 80 gallon tank and 60 gallon storage. 14 min 18 seconds is an improvement of right at 2 minutes over the test that was ran the day of installation. The storage tank is my old craftsman compressor tank. When I bought this new Quincy I tried getting $350 out of the old one. With no takers I decided to cut the motor plate off of it and repurpose it into a storage tank. Although I am guessing that Quincy is probably not the compressor they once were I would still give it a 5 star thumbs up. Good compressors are like good welders.... buy a good one early in your life and your daughter In law will sell it at your sons auction or pass it down to the grand kids. ...