Every year, the world's top automakers and automotive suppliers vie for a chance to win a Telematics Update award. In 2011, for example, Audi, BMW, Hyundai, OnStar, and Toyota took top honors in categories...
Indirectly you will save costs to the garage, but look at the tricks before the action. If you have enough knowledge about the car engine and your hobby is tinkering with the engine it does not hurt...