Just had my 2005 Accord changed oil for the first time 3000miles.
I brought 6 qt of Mobile 1 Synthetic oil to the dealer ready to start using
it but the service department recommended that I should use it at next oil
change instead of now??

I am not quite sure what he explained to me but I am pretty sure they are
not trying to save money because this is a free oil change as part of the
deal purchasing from them. I will assume that they would like to use my own
oil save them some...He also mentioned that I should put in Mobile 1 at 7500
miles and then change it every 7500 instead of 3750 (I am not clear about
this part of theory).

What is your opinion?