The word "be" means to "take place". When we use the word "being" it stresses the EVENT that took place. Saying, "My car is BEING repaired" stresses the event or incident. The word "get" means to "go for", to "obtain" or to "bring". When you use to word "getting" it stresses the ACTION YOU TOOK. My car is GETTING repaired means that a specific procedure is being done because you went to the garage. In other words, you went to get your car repaired. People say, "I was being interrogated" because it stresses the EVENT. You don't say, "I got interrogated" because you didn't go to obtain an interrogation. I hope this is helpful

It's not so much a question of formal versus informal. For instance, "I was being interrogated when they found the actual killer." -but- "My life became a hell - I was getting interrogated every week and my children were getting bullied at school every day."

They do have the same meaning, but there is a subtle difference. 'My car is being repaired today' is a simple statement about what's happening at the moment. For example, you might give this as a reason why you're cycling to work. 'My car is getting repaired today' implies that there's rather more effort involved in the process. For example, you might say 'Hallelujah! Finally, after weeks of arguing with the insurers and trying to sort an appointment with the garage, my car is getting repaired today. At last!"

I agree with the others. If you use "getting," I think saying "getting fixed" is better than "getting repaired."

Hey, both are ok, but "get" tends to be used in situations where things happen unexpectedly, like "he got stabbed", "he got robbed", "he got kissed by a stranger".