I doubt that it is too much oil, because the problem only happened recently after adding the non oil refrigerant. Last season, no sounds at all.

So I am going to try the following after the suggestions given:

1. Add small amount of oil to see if that makes the noise go away, at least a little.

2. Check the high and low pressures.

Little help please - how much oil should I use? one of those small 2 ounce bottles? Or maybe half of one, so one ounce?

Also, what should my MAX high and low pressures be? I know ambient temps change what they should be but lets say for between 80-100 degrees - what kind of pressures are we looking at?

If both of these steps dont work, im going to just ride the compressor out to its death, then worry about a new one