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Copied from another forum chat.In November 2017 I ordered a 2018 TrackHawk which was delivered exactly two months later to the day with 76 miles on it with no indication that it was singled out for additional quality scrutiny. Funny thing is that the the Conner Plant where it was built in downtown Detroit is only 20 miles or so from the dealership in Clinton Township, MI where I bought the vehicle. I have not had any issues with the TrackHawk and the only thing I've taken it to the dealer for are the "Jeep Wave" services. According to the owner's manual the break-in period for the 6.2 Liter TrackHawk/HellCat motor is 1500 miles in milage increments that gradually build up on allowable RPM and speed maximums. Haven't seen an owners manual for a vehicle with a 392 in it for the break-in guidance so if someone has that I think we all would appreciate if you would share with us please.
"Engine break in occurs mainly during the first 500 miles (805 km) and continues through the first oil change interval.
It is recommended for the operator to observe the following driving behaviors during the new vehicle break-in period:
0 to 100 miles (0 to 161 km):
- Do not allow the engine to operate at idle for an extended period of time.
- Press the accelerator pedal slowly and not more than halfway to avoid rapid acceleration.
- Avoid aggressive braking.
- Drive with the engine speed below
3,500 RPM. - Maintain vehicle speed below 55 mph (88 km/h) and observe local speed limits.
Press the accelerator pedal slowly and not more than halfway to avoid rapid accelera- tion in lower gears (FIRST to THIRD gears).
Avoid aggressive braking.
Drive with the engine speed below
5,000 RPM.
Maintain vehicle speed below 70 mph (112 km/h) and observe local speed limits.
300 to 500 miles (483 to 805 km):
- Exercise the full engine RPM range, shifting manually (paddles or gear shift) at higher RPM when possible.
- Do not perform sustained operation with the accelerator pedal at wide open throttle.
- Maintain vehicle speed below 85 mph (136 km/h) and observe local speed limits.
For the first 1,500 miles (2,414 km):
Avoid high engine and driveline loading.
Check engine oil with every refueling and add if necessary. Oil and fuel consumption may be higher through the first oil change interval. Running the engine with an oil level below the add mark can cause severe engine damage."