That little whistle from the vents and sluggish pull on the highway usually mean your car is due for some basic attention. Keeping a vehicle road-trip ready is just part of the deal, but routine maintenance has a habit of stacking up right when you least want to spend the cash.
We can time this work for when shops are slower, usually right after the summer rush or before winter weather hits, to keep labor costs down. Once you have the shop lined up, you just need a straightforward way to handle the bill without taking a hit to your everyday cash flow.
Just remember that the intro window is a hard deadline, not free money, and any remaining balance left over when those 18 months are up will start getting hit with regular interest charges.