This is about the same for me. I really don't add anything to the Suave Natural Tropical Coconut. I have in the past though but just olive oil or grape seed oil. I actually just like it on it's own. It's a good co-washer. But yeah.. I always follow up with a leave in as well.
I like to keep a lot of my products separate and do them in very small batches if I am mixing anything. Just enough for one application because I don't want anything to go bad or be rancid. So when I make it.. like a homemade protein pack.. I will just make enough for that one application and use it the same day/evening.
Any sort of leave in that I make with extra stuff added.. I just make it in a small travel spray bottle..that way it's not sitting around for very long because I will have used it within the week. I am a little paranoid about bacterial germs and things.. so I really like to keep things separate.
I have a separate bottles and jars for just about everything just to be on the safe side.