I got "New Improved EGR Cooler" and "Inlet Manifold" installed at 19600 miles and GDE tune installed at 26k miles. How often should I perform EGR cleaning (Cooler and Valve removal and cleaning) and MAP sensor cleaning? Every 60k? Oil change was performed after GDE tune at 26k as well and oil analysis at next change will determine soot level decrease. If soot levels decrease significantly, is it still advisable to perform MAP and EGR cleaning every 60k? I am not shying away to spend the money to perform the cleaning but just checking people's experience and input on it.