No problem at all. Just don't switch back and forth. Once you pick one, try to stay with it.
My car has seen Mobil 1 since the day it was bought (well besides the oil from the factory). Been using it ever since and I have 221k miles on my car. I swear by this stuff only because I know it works lol. I do every 3k as well which is sort of extreme but hey, if it's worked this long, I'll keep doing the same thing.