I have a 2016 ecodiesel with 88k on it. I bought it with 66k. I'm worried about my intake manifold and egr getting all gunked up and having troubles. I have to pass emissions so deleting isn't an option! And I don't want to fork over a ton of money to have the dealer do it. I've heard of Liqui moly to add to the fuel to help clean things out. Is there anything else besides taking the manifold off on my own to clean it up as much as possible?