My 2018, purchased Nov '17, was in the shop for a full month for cam phasers. Started the startup rattle before 20k miles. Couldn't consistently duplicated until after 20k when I brought it in. It was also making my oil prematurely dirty and needed to be changed at 2.5k according to the tech. I brought it in and they kept it for two days but needed it back for a vacation trip before it was diagnosed. I got her back after the month in the shop and check engine light came on and had a vibration at WOT on the highway, brought it back the next day, diagnosis was to replace the high pressure fuel injector pump.. Also on backorder like the cam phasers. They just got the part yesterday and are telling me I'll have it back by Monday, 8 weeks total in the shop.. Yes, the fusion sucks for a 6'2" guy but they did give me the loaner after the first week in the shop. 5W30 Mobile 1 full synthetic always changed myself. No engine mods. Never had anything even close to this happen before (at least a dozen fords in my past) but I've never had a truck like this before either..