I also use white lithium grease. Haven't done it on the SF yet, since all doors open very smoothly, but will shoot them very soon, when doing the newer G70, which has one door that feels horrible. Hopefully the lube job will make it better. Also need to lube the rubber gaskets around the moonroofs with Wurth's rubber care spray (as well as the rails and hinges with white lithium as well). The good thing about the German Wurth spray is it does not contain any silicone, which is not great for rubber. Also want to make sure both moonroofs operate properly, since I haven't tried them since I bought the vehicles a few weeks ago.