Cars need a range of services at all intervals but when you make it to the 100,000-mile mark you do need to take some services into consideration. When you get to the 100,000-mile mark a huge range of different services are needed and your transmission fluid exchange is one of the most important. You can also get an oil change at this point. On top of that, you should also get our engine air filter changed, your spark plugs replaced, and your oil filter replaced as well. On top of all that, another 100,000-mile service that is necessary is an inspection of the fuel system as well as the exhaust system. Your mechanic may also check other systems to help make sure your car is working the way that it needs to and that you are going to be able to get many more miles out of it.