I have not. I use a high smoke point oil like grapeseed, but my son who works in a restaurant just uses canola oil. I admittedly don't use mine much though, but my son only uses cast iron, stainless, or carbon steel pans and skillets.
I have not had any issues with food sticking to my cast iron, but the key is the seasoning of the skillet. It truly does get better with use.
I have also seen that you are not supposed to use non-stick spray on teflon skillets and I have done that all my life. Oh well...
Clay