Welcome to the forum.. You have discovered the Friendly & Knowledgeable in the forum.. Tip.. when working with a problem.. START with the Very Basics.. its to easy to go for the most complicated and as you discovered it was the basic.. now for the OIL, go with the owner manual recommendation on viscosity and MS certification .. Read closely as there might be a note that 5w-30 is acceptable too. Now for the zippers.. there is a lube and then there is Vaseline - a light coating will last awhile too. You said it.. Utube has multiple help videos Good luck and get out Jeepin...