I drive a VW sedan, but it’s technically not my car but my dad’s. It was due for an oil change and instead of taking it to get serviced, I just went and bought myself new oil and an oil filter and did the change myself. It went fine and I thought it was no big deal. 

My dad is super annoyed that I did that and claims it was irresponsible, and yelled at me after I already did it that car is not a toy I can just take apart and play with.  I did tell him I was going to do it before it happened, but in a statement rather than a question. 

AITA for performing a routine maintenance service on my daily vehicle without consulting my dad, who’s the owner of the car?