Is AUTHOR wrong in the post ? POST : So this story is a few years old and has pretty much resolved itself but its nice to get other opinions. 

I (25 F) was given a van (bought and paid for by my deceased grandfather years prior. It was a 2001) in highschool and used it as my sole transport until 2017 when it was keyed and had 3 of 4 tires slashed. Im a very quiet, stay at home person so we never knew who it was. Didnt really matter; insurance totalled it for about 3k which I used for my current car. Now until then my grandma was generous and paid the insurance. It really helped build a good driving record for me. Much appreciated. Also, while i did drive the van to highschool most days dad did freely take it whenever he pleased.

I also have a stepmom and stepsister. Mom i get along with fine while sister is a little rocky. We are totally civil at gatherings but just dont talk outside of those. No animosity just different people. Shes 4 years younger than me. Her mom and my dad have bought/given/helped obtain a total of 4 or 5 cars for her at the time of my van getting vandilized. The reason for so many is because she keeps crashing them. We never go into full details because neither of them talk to me about her very often. This does all have a point i promise.

Anyway we find a car that my dad says is a great deal. 2012, 25k miles for 10k. Sweet. He explains to me him and stepmom feel a little guilty helping sis with all her cars while i just had the gas guzzling van. He says theyll pay the car payment while i get insurance. Cool! I happily accept. And everything is in my name btw. Get the car abd everythings cool for a few months.

Dad then asks if he can take my car to florida since his car is worse on gas. Hed let me use his car that week. We live in michigan so its not exactly close. I explain id rather not put that many miles on it just for a vacation. He flips out saying how hes the one paying for it and that im ungrateful. That i never thanked stepmom (i did and have text proof) and that he wont forget this the next time he needs something. He cant believe that id be like that over only 2k miles. This was all a txt convo so i can probably dig it up. Anyway i just said i can pay for the car if thats how he feels but he kinda shut up about. Hours later txted me he was proud i wanted to keep my car nice. It was kinda weird idk. He still pays for it and i pay for insurance. Sometimes i wonder if i was just being a selfish bitch but he didnt ask to take stepmoms little 4 door or sisters. And he never ended up going to florida because of other money things. Oh and if it was for an emergency of course id give him my car! It was just for a vacation so it wasnt serious.

TL;DR: dad offers to pay car payments willingly after car gets vandilized and gets extremely upset when i dont want him to take my car from michigan to florida for a week to save gas money. Everything is in my name. I offer to take over all my own payments which he doesnt like but stops asking about the car.