Manufacturers for a number of automakers are providing free routine maintenance on their vehicles. Understanding not only how to best maintain your car but also what services are most-important in maintaining warranties are critical. Finding out if your car has a free maintenance plan that you haven’t been taking advantage of will be the first step of the process to ensure it is up-to-date and you have the records on-hand when you decide to sell it. This is also helpful if you are actively in the process of looking to purchase another vehicle. Looking at four manufacturers service plans will kickstart this research as this additional provision may influence your decision on your next vehicle.