Be careful how one uses the company name WD-40 because they DO have a variety of products that ARE lubricants. I always used it as a penetrating oil/water displacement spray to help lubricate rusted fasteners so they can be removed. NOT as a grease or oil on toys.
https://www.wd40.com/
Just search the Internet. Not all "RC-ers" use the correct tools or have the right information.