For the Ford Techs out there... I have a 2010 F250 with the V-10 in it. Currently, I have 300 miles on it. I normally do my first oil change at 1K miles...Given that, I have not had a gas tryuck for awile, so what is a safe mileage to switch to full syn oil? I am an Amsoil dealer, so that is what I will be using.

Thanks!