I smell oil and I have a hissing noise. The hissing noise, everyone has checked my setup and everything is as it should be. I'm also told that the hissing can be normal and don't worry about it if I have no codes. The oil smell, no one has addressed that. I have a "good " RX and I'm sorry, hissing and oil smell is not normal. Re-ran my lines with heavier hose and it did lower the hissing.