96 subaru acts like it runs out of gas and wont start for rest of the day

every 2 to 3 weeks the car will stall while driving and acts like its out of gas. 3 tows and no mechanic can figure out what the problem is and the car starts the next day.

You’ll have to figure out whether this issue is fuel or ignition related.
Next time it won’t start, pop the air filter out and spray some starter fluid into the intake.
It evaporates quickly so try to start it quickly. If you notice that the car tries to start, your ignition is good and it is likely fuel related.
If it just chugs the starter without any indication that it ‘catches’, it may be ignition related.