It helps the tire fluid flow through the radiator better.
Speak about tires.. why one day my tire pressure will be 35 then next day there 23 and the next 47 lol
That's very odd. It might be worth having a tire shop check if there's water or moisture in your tires. Temp changes will make that jump around too.
In fact before you go call around and ask who will fill tires with nitrogen. That's way better for your climates.