I recently bought my mother in law a new 2019 Elantra, 2 liter auto base model. $16.9k out the door. What oil, filter should I use? What change interval? What about the transmission, when do I change its fluid and with what? Anything else I need to know? I want this to last and not have to work on it out of warranty. Will be used for short trips around town, Florida so HOT. Occasional trips out of state.