I want to buy a new car. Should I:
1-Take a loan now from the bank. (I don't have any savings)
2-Save 15000$ before taking the loan, and put them in a savings account to offset the car loan interest.
3-Save 15000$ and buy the car in cash
I would suggest that you do #3 and pay cash for your car, cars lose value very fast and are not very good investments so I would not want to pay any interest if I had that option.