Homemade silent air compressor

[Sleykin]

How long do the refrigeration compressors last pumping air? What kind of lube do you use in the compressor, and how do you check levels etc.?
They would be perfect for airbrushing or using a pencil die grinder. My shop is plumed for air with the tank and compressor outside in it's own little outhouse. I also have a little pancake compressor for jobs away from the shop. Trouble is, when those guys run everybody hears it...this would be a great addition