I also do italian tune up variations, but mainly to ensure that the high PEA I add has a way to push high volumes through the injectors. The tune up won't do much for the back of those valves unless the engine has one of those faboed timing set ups that gets fuel behind the valves (one theory that explained ecoboost dilution and high fuel use with ability to go 100k wuth no cleaning). I understand that changing too often keeps the noack elevated and makes the oil problem in the system worse. I vaguely remember that being a reason to not change the BMW oil too frequently as per some BMW recommendation...
I am currently investigating walnut blasting options along with an atf flush for Xmas. Well, ok maybe methanol injection for Xmas but the basics need to be done first.
Originally Posted By: ChrisD46
My DI engine hygiene : Top Tier Fuel , Low Calcium Dexos approved synthetic oil (M1) , < than 5,000 mile OCI's , don't lug the engine , every three months take it out on the interstate for a : "Italian Tune up" (20 minutes at 4,000 RMPM's ) , walnut shell blast by Hyundai before 100K miles.