If it is Schwintek slide, I think CRC lub is recommended. Check the Lippert LCI.COM website for a how to video.
If it is a above floor Lippert slide, I like the dry lube so it does not attract dirt.
I am sure when folks start chiming in every lub will be mentioned.
2014 Sunseeker 3170 DSF
Dorothy, Garrette and Miss Bella.
Retired and having fun.
Our Slide makes a horrible noise unless the R.V. is Absolutely Level. I did it once on a flat surface without the jacks down and realized that it was scrapping wood. After that no issues but I don't open it unless I am totally leveled with the jacks down.