I have both a Porter Cable oil-free 6 gal pancake compressor and a
Harbor Freight oil-lubed 5 gal twin tank. The PC is, IMO, unbearably
loud for home shop use. I'll usually switch it on it on, leave the shop
for a few minutes while it pumps up, and hope it doesn't kick in again
while I'm working. Honestly, I'm much happier with the HF, which is
quieter, more powerful, and has worked flawlessly for me.