I just bought a Purolator (Premium Plus, but it no longer says that on the new package) L25230 for my sister's ZX2 and it says on the box that the gasket is internally lubricated. I felt it with my finger and it felt slightly greasy already. Should I still bother putting oil on it before putting it on the engine, or is this internal lubrication good enough? Anyone have any experience with these new Purolators?