Every few thousand miles, take your car in for an oil change
. While you're here, your technician will also top off your fluids and take note of any mechanical problems so you can get necessary repairs done. Besides the fact that the oil change keeps your engine working properly, this is the best way to catch early signs of damage or disrepair.
Since you'll probably want to get an oil change around twice a year (more or less depending on your driving habits and the type of oil your vehile takes), this is a good time to replace your windshield wipers, check your tires
and tread, and make sure your lights are working.
At 15,000, replace your air filter. 20,000 miles is time to change the coolant. Replace your fuel filter at 25,000 miles. Do a flush of your power steering fluid and replace it at 30,000 miles (and do another air filter replacement). Check your battery at 35,000 miles and replace it if you need to.
At 40,000, change the spark plugs, then change the spark plug wires at 45,000. Have your suspension and ignition system checked at 50,000 miles. At 60,000 miles things get a little more serious, and you need to replace your brake pads, timing belt, and radiator hoses, along with replacing your coolant and power steering fluid.