Was wondering if anyone waits in park before turning their SHO off. People have told me to wait, people with older turbo cars. But I have also heard the F150 has a system so that you don't have to idle. I was told the purpose is to have the oil circulating while not under load to cool the coil because the tubos still spin for a second or two after the engine has been turned off. That its better to have cool oil running threw the turbos. I've been waitin ( have a smoke in park) then turn it off. Does not waiting have any effects on the turbos or is it a waste of time?