I found this info helpful.
http://www.mgaguru.com/mgtech/tools/ar101.htm
http://www.mgaguru.com/mgtech/tools/ar102.htm
You know what's really funny reading thru that, is I have the same (similar) compressor from Sears. He keeps making jobs about how smart he was when he bought his, and how the "new" compressors these days have much lower output (he quotes I believe 7.5 cfm @ 90 psi for his, mine is 5.8 cfm @ 90 psi). What actually happened is a whole bunch of manufacturers/stores lost a lawsuit and had to start advertising the actual running CFM, so that is why all the ratings dropped (I saw a my previous compressor rated much higher). But anyway, glad to see he has had good luck with that compressor, I hope mine holds up just as well, although I think my pump is Chinese made and his was US made