A new air compressor
I drained the factory filled oil after a few cycles, and re-filled the sump with non-synthetic air compressor oil making sure to lean the compressor to get nearly all the oil out of it. After about a year of use, I re-drained the oil and put in Amsoil synthetic air compressor oil.
I also used nearly 45 feet of galvanized pipe to cool the heated compressed air with ball valves and down-legs to drain 98% of the water from the air prior to finally passing through an up-hill mounted water trap. It will make a huge difference in drying your air and extending the life of your air tools.