All the 450s run with minimal synthetic oil requiring changing every race or 10 hrs.
Oil shear forces are huge in these engines, destroy VI improvers, even though the oil looks clean it must be changed for top quality oil.
Chassis' are better than the old 250R, and longer duration between power pulses tends to set the tires for better traction.
Power and chassis are easier to control.
When these engines drop a valve, or in my case, break a rod, the cost is immense.