You can use the garage door spray lube available in the box stores for the springs, rollers, and hinges where the two halves rub together. I take a piece of cardboard and slip it behind the springs, one at a time. Spray the top of the spring and the oil will run down and around it. You don't have to drench it, wait a half a minute and wipe off any drips with a rag. Hold a rag next to the hinge and just give it a tiny squirt. Do both sides of each hinge, it'll get rid of creaks and squeaks. Only oil the rollers if you have metal rollers with ball bearings inside. You'll be able to see the little ball bearings, that's where you want to give it a little squirt. DONT grease or oil the door tracks, all that does is attract dirt and make a mess. I've never lubed a chain on an opener. They come lubed from the factory and don't move fast enough to get rid do that oil. You can apply a little white grease to the T-shaped track the trolley rides on. Just a thin smear, don't glob it on. That's really about all that required.
Mike Hawkins