Lubrication of Air Compressor

To those knowledgable on air compressors - and I am not one of them.

I noticed today when inflating tyres that my Dr Air compressor sounded a bit rattly for the first 30 seconds after which it settled down to its normal sound.

I then did some web searching on " lubricating piston compressors" and found a lot on lubricating systems for industrial type compressors. Didn't seem to be anything relevant to a small compressor. I know oil, compressors and heat can equal loud noises and possibly flames.

So the question is: Does a small compressor such as the Dr Air require some form of lubrication? If so what and how is it applied so the piston doing the work is lubricated? graphite powder?

John