Filler cap says 10W30, but I have all this Amsoil 5W30 left over from Ohio. Now I am in Florida where it is hotter. Would using up this oil down here in Florida harm the engine? It is new and only has 3000 miles on it. Was going to do first change with Pennz 10W30 dino and then go to the Amsoil. Whatcha think?