Thank for info. I may try 5w50. Just nervous to do anything out side of the manual.....

In these engines, are there valve adjustments, or maintenance that can address this or is it major engine work, or is it electronic tuning?

2019 Bullitt with 15k miles. I track it 2-3 weekends per year. Manual/book says to run 5w 30 oil for track. Not practical for me to change oil between 5w20 street and 5w30 track, so I was told it's ok to run 5w30 all the time, just warm up the engine good before going out, and I do. The car...

I have 2019 Mustang Bullitt. I track it 2-3 times a year, just to drive fast, I'm not competitive. I've installed Vorschlag plates just to save some tire life. Also running 285/35 ZR19 square set up. Those are the only changes I've made. Now the car has a frustrating, "thunk" sound when I...

Great post. Thank you.

I was told stock/factory cars are the most dependable. Too many mods could lead to failures at the track. I have a 2019 Bullitt and the only change I made was brake fluid. Pure joy for track day fun and no wrenching. Now I'm looking for tires and will probably stick with MPS 4s, just go at...

2019 Bullitt with stock Michelin Pilot Sport 42 tires. They have 10 track days and 7000 miles on them. The front outside edge of tread is gone ft left and ft right almost gone. The larger rear tires still have some outside tread left. The center of the tire is fine. Front 255/40 Rear...

I'm looking to replace my stock Michelin PS 4s (275/40, 255/40) with the same size 285/30 'square' is that sizing much better on the track? Also I was told if tires are too much out of balance, they can be repositioned on the rim and you find a position so much less weight is necessary...