Clock oil is generally a bit too thin and light, but I guess works. Sewing machine parts are much more sturdy and see different wear and use and can benefit from slightly heavier oil. It last longer and you can find something like Triflow, a pure basic sewing machine oil. I personally have found a favorite in Finsh Line Ceramic Wet lube (bottle with gold cap), it makes my 99 and 201 run extra smooth. That said, I have not used clock oil on my machines, I have had those pens with watch lubricant, and it can be nice but often a bit too dry to be ideal for (relatively) heavier machinery like sewing machines.
Loosing everything to a fire is the worst thing. I wish you best of luck and hope you get to pick your self up and track down replacements for the things you lost. An Elna Electronic Air has all the stiches, but the loss of two Featherweighs is sad. They look so nice, especially the ones with swirly pattern on the face plate. Hard to choose either way.