Hello, Today we have another UOA from my 2016 Ford F150 with the 5.0 Coyote V8. This vehicle has a Roush supercharger, which has been modified with an upgraded fuel system (pump/injectors) and several other go fast goodies. This vehicle is a work in progress, and as such the parts list that is on the truck now is not necessarily what was on the truck during prior OCI's. Iron is down and lead is much higher, and I'm thinking fuel dilution is the cause for several reasons...mainly the new tune and lower temperature thermostat. During this run I used Mobil 1 0w40, which has been in use since about April of this year. During this OCI, the truck was tuned by yet another 3rd party tuning company, and the cooling system was modified with a lower temperature thermostat. I also suffered a tuning device failure which resulted in the truck to be temporarily idled with the factory tune and my 1000cc injectors which made it run pig rich. However that was months ago, and it has been running fine since then. Lastly I've used numerous bottles of octane booster during this OCI, as part of a long term study I'm doing on my truck forum regarding spark advance on supercharged Coyotes with pump vs high octane fuel. Lastly I also used some Liqui-Moly MOS2 during this OCI, about 4 ounces, to finish off a half bottle I had laying around. I've stopped using this product for the next OCI. I'm not going to make any changes until I run another UOA to track the fuel dilution and lead. If it happens again I'll make some changes to the tune and possibly up the thermostat temperature.