I bought a new bike for my son on craigslist and want to grease up the chain a little. Someone at work (who is not a bike mechanic) told me to use WD 40 on the chain. I read somewhere else that WD 40 is a terrible idea unless you use it every time you ride. Since I am not going to do this all the time, is there a brand/type of lubricant I can use. I'd like to spray some on my bikes before I put them away for the winter in the next month or two. Thanks!