I currently have a small bottle of red RockShox 15wt fork oil left over. As I no longer own a RockShox fork, this oil seems pretty useless to me. (Fox specifies different oil weights, and I can't figure out whether the oil would be ok to service my new 34 Rhythm fork. Preliminary research ranges from "usable in the lower legs" to "better safe than sorry, so use only Fox oil".)
Suppose I can't use the oil for the lower leg service of my Fox fork - are there any reasonable bike-related use cases for the oil? Probably the oil is too thin as a chain lubricant, right? Or should I rather try to find someone who actually needs it for his/her fork?
As an aside: There are loads of questions on the internet about the reverse case: "What oil can I use instead of the manufacturer-recommended oil?" But I can't seem to find an answer to my question.