How can I make my location data available so OSM developers can include my locations if they choose?

Thank you for your offer and interest in OpenStreetMap! There are several options to make use of your data (import).

I think it would be best if you would have a look at the linked import page and then start a new forum thread (or mailing list thread, if you prefer) to discuss the specifics. This is better since this help site is not suited/intended for discussion and longer, highly specific topics. Please mention the link to the forum/ML post once you have did it (for others finding the topic here and wanting to read on). Answers (or clarification inside your text) to the following questions should be included.

• You have location data of each of your car sharing stations which you would like to see incorporated into OSM, right? So everybody can use/see it. E.g. on the many OSM-based maps.
• How was that location data generated (what is the source of these positions? e.g. looked on a map or sat picture to derive the position?)? We have strict licensing requirements (to keep our data free and hence not all sources are usable.
• Under which license do you want to offer the data?
• How accurate are the positions?
  
• Do you want to just dump the data somewhere (to be used by helpers) or do you want to also invest work/time to correctly integrate (maybe correcting/adjusting positions of your positions or the positions of the surrounding OSM data, de-duplicating with pre-existing data, …) this data into our database, which is very important (there is no "OSM developer" regarding the geodata – we are crowd-sourced.
• Since you originally mentioned "api" as a tag … one should think about how future updates to this dataset can be managed.

The answers to other, previous, questions about imports (e.g. how-can-i-import-pois-from-a-postgis-database) can be helpful too, of course.