Don’t Use WD-40 on Your Garage Door!
A quick tip for all garage owners around the world: don’t use WD-40 for garage door lubrication. Contrary to popular belief, it’s not a lubricant. It’s actually a solvent. It will strip out every last bit of oil, leaving full on metal-to-metal contact.
Initially, this might provide improved door functioning, but that would only be due to the cleaning quality of the solvent. Over time, it will actually degrade your garage door parts.
You CAN use it to clean parts like rails if you want. White lithium grease and silicone are two of the best choices and offer superior lubricating qualities. Just be sure you’re lubricating the correct parts and don’t overdo it!