Can I change the oil in my car at that walmart?

No. There are no mechanics or shops in this store. Doing it yourself in the parking lot could result in calling the police. Used Google Translate.

No you can't change oil there.

I don't know if you can change car oil, but call the store. People can help you in Spanish on the phone too. Good luck!

I don't read spanish.

I don't speak Spanish either

I don't speak Spanish.