We all know how DI makes nice power, but can cause buildup on the valves. I have read having a good oil change regime with top quality full synthetic, and running top tier premuim fuel with their additives helps. I also know running a catch can (oil seperator) is a very good idea as well. I run one on one of my cars now. With that being said, what are you all doing? I hear the dealer of course offers a cleaning service. But not sure what exactly that entails at a Ferrari dealer, or how often they recommend doing it. Any input would be great.