Driving is mostly about the stuff you don't notice until it breaks. Tires are the classic example. You ignore them for three years, and then suddenly you're sliding in the rain or failing an inspection. Owning a car means planning for these $750 hits before they happen so you aren't stuck using a high-interest card at a shop that smells like old coffee.
We found the best way to handle this is to separate the price of the rubber from how you pay for it. April and October are the sweet spots because manufacturers want to move inventory before the seasons shift. If you time it right, you can get the best tires for your commute without draining your emergency fund all at once.
That 0% intro APR for 15 months on purchases and balance transfers is a tool, not a gift. It is a strict deadline. If you still have a balance after those 15 months, the standard interest rate kicks in on whatever is left. Set your monthly payments to automatic so you don't get caught with high interest later.