Taking care of a car gets expensive fast between gas, insurance, and routine upkeep. Early spring is usually when local shop rates are softest, right before detailers get slammed with summer prep and raise their prices.
Always negotiate the service price directly with the shop before you talk about how you are paying. A card window works best for managing maintenance extras like deep leather conditioning, letting you spread out the bill while keeping your cash in the bank.
A 0% intro APR gives you time, not free money. If you still have a balance on the card when the 15 months end, regular interest kicks in on whatever amount is left.