All great answers above!
With the YH comps, I got annoyed w/ the C temp gauge, so swapped mine out for a F temp gauge via Scamazon..
Initial prep: I use Royal Purple 100% synthetic Compressor-Oil in mine, and the stuff works fantastic.
I've used that in every compressor I've ever owned: several smaller, medium sized, and industrial/shop sized compressors.
Never a single failure, so I continue to use it and highly recommend it.
Cooling: As mentioned above.. I just use a 5-gallon bucket next to the comp - filled about 3/4 of the way w/ cold water.
To aid in better / faster cooling, I have a few 2-ltr soda bottles that I've filled with water and keep in the freezer..
I'll put 1 into the gallon bucket, and the comp can usually go forever w/o really breaking 130*F [that's about 54*C]
These comps do build condensation/water in them, and the OEM oil/water separators aren't the greatest,
so you can either upgrade them, or, just get into the habit of manually purging the comp every 10 min or so..
Just a quick twist of the bleeder screw, and they'll spit out enough to keep them operating safely..
I have my comp in my kitchen, under a table, on a wooden floor - so as you'd imagine, it's loud and vibrates like crazy..
To help cut down on that, I actually used the thick white foam that came in the box as a 'stand'.
The wait of the comp compressed it's feet into the foam, so it stays put perfectly, and is a Lot more tolarable when running.
I've officially had my YH for over a year now, and **knock on wood** it still runs absolutely flawlessly.
Tip - other than upgrading the filter and/or pump is to just periodically double-check all the connections.
I'd also double check random nuts/bolts/etc. as these things can potentially commit vibratory-suicide.
Sam -