Just a few questions?

[Erics2010Ranger]

Hi my name is Eric , I am from Lafayette , Oregon. I recently purchased a 2010 ranger sport 4x4. So far I am pretty happy with it but I would like to add some exhaust and looking for some suggestions. I will also add a K&N intake. I also need to change the oil in the front and rear differentials, I have been told that I need to add certain additives and some say no I don't have to.

Thanks,
Eric