I agree with jennifer. Get out and dont look back. Now that youre 18, anything your parents give you is totally extra. If your dad or grandma can help you make plans, go for it. But the negativity from your mother - get it out of your life. Out, out, out. I wish you the best, you seem pretty sensible. Btw, i almost did the same thing to my first car, with the oil. Nobody tells you these things!