Customers look at a Jeep vehicle for sale on the sales lot of a Chrysler Jeep Dodge dealership in Miami. Getty Images

Planning to buy a car? You could be driving it for a long time before you're out of debt. As interest rates rise and vehicles become more expensive, that new-car smell increasingly comes with larger loans and lengthier terms. Americans now owe nearly $1.3 trillion in auto debt. Last month, the average interest rate on a new car was 6.19 percent, compared with 4.9 percent a year ago, according to Edmunds, which provides research on the car industry. The average monthly payment has swelled to $551 from $524. In addition, the typical term for an auto loan is now 69 months, up from 61 in 2010. "Vehicle prices and interest rates are so high right now that consumers are facing the very real possibility of spending thousands of dollars more on a new vehicle than they did last time they purchased a new car," said Jessica Caldwell, Edmunds' executive director of industry analysis. However, you may be able to reduce your car debt. Here are some strategies.

Consider a used car

Philip Reed's 21-year-old BMW Source: Philip Reed

Used cars are typically less expensive than new ones, and so the loans for them are often smaller, said Philip Reed, an automotive writer at personal finance website NerdWallet. "If you turn on the football game, you will be brainwashed into thinking you need a new car," Reed said. "People don't understand how reliable a good used car can be." While the average vehicle on the road is around 12 years old, Reed said, a car's price tag can be cut in half after just three years. The average monthly loan payment for a used vehicle in January was $407, nearly $150 less for a new car, according to Edmunds. Thoroughly vet the history of any used car you consider buying, Reed said. Using the vehicle identification number, located on the driver's side dashboard, you can check the car's history with the National Insurance Crime Bureau, CarFax or the National Motor Vehicle Title Information Center. You may also want to have the car inspected before you buy it, to make sure nothing was missed on the car's record.

Go to the dealership prepared

You should go to your bank or credit union and get pre-approved for an auto loan before you enter a dealership, said Rebecca Borne, senior policy counsel at the Center for Responsible Lending. "It puts the consumer in a better bargaining position," she said. "It forces the dealership down on the rate." Borne also recommends "cross-shopping" at other dealerships to try to lock in the best price on a given car. Autotrader is one database of used and new cars. Don't be sucked in by low monthly payments, Borne said. If you're able to make higher payments on a shorter loan term you'll save overall. And resist the often unnecessary add-ons that many dealerships push, she added, such as extended warranties and additional insurance. "They give a windfall to the dealer without giving much benefit to the consumer," she said.

Look for deals