I am replacing the RAVE valves on my 07 Summit X and they finally came in and finally found time to do it this weekend. I was going through the diagram and noticed several spaces where the diagram shows oil. What type of oil should I being using on the assembly? I am also curious if the gasket at the base of the assembly is reusable or should I be buying a new set? Not adverse to the spend, just wanted to make sure before I take them apart that I have everything at hand to put it back together. Thanks in advance.