2019 GT with an added Roush SC kit at 18K miles. It has 110K on it now (mostly highway miles). Oil changes, spark plugs, coolant changes are all I have done. It does have a Cat that is going out but that isn't unusual for boosted engines. Just do the scheduled maintenance and they last a long...
From my experience with my 2019 GT, Roush SC... I have always used Ford 5w50 synthetic. I changed to Castrol, 5w50 same weight and after it being in the car for 3K-4K miles started hearing the idle tick that I had never heard before. Changed back to the Ford racing oil 5w50 and it went away...
Yes. Contrary to some opinions on here, I run a 305/35/19 on the rear and 285/35/19 both on 19x10 wheels. probably going to go to 305/35/19 all around on 19x10 next tire replacement.
normal behavior while driving. Your difference when you checked the battery is probably related to you checking it at the battery and where the system monitors the voltage. If you look at the data bus signals there are different places in the electronics that it monitors the voltage.
Here is what helped mine and made a huge difference after I ruined a set of tires in less than 15K miles. Added a set of adjustable camber bolts and set them at -1.4 (you can go closer to -1.0 if you want). Make sure the toe stays aligned (largest contributor) and the cold tire pressure is 32...