Manufacturers typically recommend that cars receive a tune-up every 30,000 miles or so. However, there are a few factors that can affect how often your car needs this type of service. For example, if you frequently drive in stop-and-go traffic or in extreme weather conditions, your car may need to be serviced more often. Similarly, if you use your car for towing heavy loads or frequently drive on unpaved roads, you may need to have the engine adjusted more frequently.