Tire pressures is this right?

[np2004]

I just readjusted my tire pressures now that it seems like the warmer weather is here to stay! I set it at 32psi for the fronts on OEM all season 19's that come standard with the sport package and 32psi for the backs on my 4.8i with no 3rd row seats. The X5 manual said this is the proper pressure for travelling over 100mph with 4 passengers I believe. It seems super low compared to the 38psi the dealer set up in the rears and 34psi in the fronts. What do others set there tire pressures to for the 4.8i with sports package on the OEM all season 19's with no third row seats?