Don't overlook banks and credit unions where you already do business as sources of auto loan financing. They may offer you significantly lower interest rates and give you more flexibility in the repayment terms of your car loan. Don't eliminate dealer financing as an option when purchasing a vehicle; just be aware that car dealers often add extra points in exchange for a lower interest rate, or charge more for the vehicle itself.
Unless you are able to pay off your loan early, it will usually take several years to repay. Making timely auto loan payments will help increase your credit score, which will allow you to get a less expensive loan the next time you purchase a vehicle. In fact, demonstrating responsibility with an auto loan is one of the best ways to improve your credit.