I was going to rebuild a freehub body for winter duty. In the past I've been "seat sacked" while pedaling because the pawls didn't engage in the cold. Not comfy down there when it happens. There is a primer or two on the internet how to lube pawls for winter duty, not that the OP is going to be doing any winter riding(?). One fellow even suggested kerosene as it is very light and leaves an oily finish. But yeah, as others have said here, a light oil for the pawls.